bytelyst/learning_ai_clock
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity
c02d8cf08c
learning_ai_clock/docs/roadmap.md
saravanakumardb1 c02d8cf08c docs: add comprehensive product roadmap (5 phases, Option D strategy) 
- Phase 1: Web MVP (Next.js 16 PWA) — timer engine, cascade, visual timeline
- Phase 2: Intelligence — routines, NL input, focus mode, neurodivergent mode
- Phase 3: Apple Native — iOS + Apple Watch + macOS (SwiftUI, not KMP)
- Phase 4: Context & Growth — calendar sync, location, sleep, viral mechanics
- Phase 5: Android + Scale — Jetpack Compose, Wear OS, shared timers, monetization
- Includes: viral playbook, success metrics, risk register, tech stack summary
- Checklists for every phase with exit criteria
2026-02-27 17:27:05 -08:00

42 KiB
Raw Blame History

ChronoMind — Product Roadmap

Product: ChronoMind — AI-Powered Time Awareness Layer Strategy: Option D — Web PWA (MVP) → SwiftUI (iOS/Watch/Mac) → Android (v2) Created: February 2026 See also: PRD.md | INDUSTRY_RESEARCH.md

Executive Summary

ChronoMind ships in 5 phases over ~6 months, from web MVP to full cross-platform product:

Phase Timeline Platform Goal
Phase 1 Week 1-2 Web PWA Ship MVP — validate core concept
Phase 2 Week 3-5 Web PWA Intelligence layer — make it smart
Phase 3 Week 6-9 iOS + Apple Watch + macOS Go native — own the wrist
Phase 4 Week 10-14 All Apple + Web Context, sync, growth — make it sticky
Phase 5 Week 15-22 + Android + Wear OS Full platform — scale to everyone

North star metric: Daily Active Users who set a timer with pre-warnings enabled.

Architecture Overview

┌──────────────────────────────────────────────────────────────────────────┐
│                        ChronoMind Architecture                          │
├──────────────────────────────────────────────────────────────────────────┤
│                                                                          │
│  Track 1: Web (Next.js 16)              Track 2: Apple (SwiftUI)        │
│  ─────────────────────────              ────────────────────────         │
│  src/lib/timer-engine.ts   ──port──→    Shared/TimerEngine/*.swift      │
│  src/lib/cascade.ts        ──port──→    Shared/TimerEngine/Cascade.swift│
│  src/lib/recurrence.ts     ──port──→    Shared/TimerEngine/Recurrence.  │
│  src/lib/store.ts (Zustand+IDB)        Shared/Store/ (SwiftData)       │
│  src/components/ (React)                ChronoMind/ (iOS SwiftUI)       │
│                                         ChronoMindWatch/ (watchOS)      │
│                                         ChronoMindMac/ (macOS menu bar) │
│                                                                          │
│  Track 3: Android (v2)                                                   │
│  ──────────────────────                                                  │
│  TimerEngine/*.kt (Kotlin port)                                         │
│  UI: Jetpack Compose                                                     │
│  Watch: Wear OS + Glance widgets                                        │
│                                                                          │
│  Shared: Cloud Sync API (optional, E2E encrypted)                       │
│  Analytics: Plausible / PostHog (privacy-first)                         │
└──────────────────────────────────────────────────────────────────────────┘

Phase 1: Web MVP — "Make It Work" (Week 1-2)

Goal: Ship a functional PWA that validates the core concept — pre-warning cascades make timers actually useful. Success criteria: 10 people use it daily for a week and say "I can't go back to a normal timer."

Week 1: Foundation + Timer Engine

  • Project scaffold

    • npx create-next-app@latest with Next.js 16, App Router, TypeScript
    • TailwindCSS v4 setup + shadcn/ui init + Lucide React icons
    • Zustand store with IndexedDB persistence (via idb)
    • ESLint + Prettier + Vitest config
    • Basic folder structure: app/, components/, lib/, styles/

  • Timer engine (lib/timer-engine.ts)

    • Timer interface with all fields (id, type, label, urgency, targetTime, duration, cascade, etc.)
    • Create timer (alarm, countdown, pomodoro)
    • Start / pause / resume / cancel countdown
    • Timer state machine: idle → active → warning → firing → snoozed → dismissed
    • requestAnimationFrame + setInterval dual-loop for accurate countdown
    • Unit tests for timer state transitions

  • Pre-warning cascade (lib/cascade.ts)

    • Cascade presets: Relaxed (2h, 1h, 30m), Standard (1h, 30m, 15m, 5m), Tight (30m, 15m, 5m, 1m), Critical (2h, 1h, 30m, 15m, 5m, 1m)
    • Custom cascade builder (user picks intervals)
    • Cascade scheduler: calculate all warning timestamps from target time
    • Cascade state tracking: which warnings have fired
    • Unit tests for cascade calculation edge cases (past warnings, overlapping, etc.)

  • Urgency system (lib/urgency.ts)

    • 5 levels: Critical, Important, Standard, Gentle, Passive
    • Each level maps to: notification style, sound, vibration, visual intensity, snooze behavior
    • Critical: persistent sound, full-screen overlay, no auto-dismiss
    • Passive: badge only, no sound

  • Visual timeline dashboard (components/Timeline.tsx)

    • Vertical timeline showing all timers for today/upcoming
    • Color-coded by urgency level
    • Current time marker with smooth animation
    • Pre-warning markers on timeline (small dots before each timer)
    • Tap timer → expand to show details
    • Empty state: "Your day is clear — set your first timer"

  • Create timer flow (app/(app)/create/)

    • Quick timer: one-tap presets (5m, 15m, 25m Pomodoro, 1h)
    • Alarm: date + time picker, label, urgency dropdown, cascade preset
    • Countdown: duration picker (hours, minutes, seconds), label, urgency
    • Form validation with Zod
    • Save to Zustand store → IndexedDB

  • Large digital clock (components/Clock.tsx)

    • Current time with seconds, subtle glow effect
    • Date display below
    • Next timer countdown shown prominently
    • Responsive: hero on landing, compact in app header

Week 2: Notifications + Polish

  • Notifications (lib/notifications.ts)

    • Request notification permission on first timer creation
    • Service Worker registration via Serwist (@serwist/next)
    • Schedule pre-warning notifications at cascade timestamps
    • Different notification styles per urgency (title, body, icon, sound tag)
    • Notification click → open app to timer detail
    • Fallback: in-app toast if notifications denied

  • Sound system (lib/sounds.ts)

    • Web Audio API setup with AudioContext
    • 5 built-in alarm sounds (gentle chime, standard beep, urgent siren, critical alarm, soft bell)
    • Volume mapping per urgency level
    • Sound preview in settings
    • Graceful fallback if audio blocked by browser

  • Tab title countdown (lib/tab-title.ts)

    • Show "⏱ 14:32 — Standup" in browser tab title
    • Update every second for active timer
    • Flash title when timer fires (alternating "🔔 TIME!" and timer label)
    • Restore original title when no active timers

  • Alarm overlay (components/AlarmOverlay.tsx)

    • Full-screen overlay for CRITICAL urgency
    • Pulsing animation, sound playing
    • Large "Dismiss" button (with confirmation for Critical)
    • "Snooze 5m / 10m / 15m / custom" buttons
    • Cannot be accidentally dismissed (swipe-to-dismiss disabled for Critical)

  • Pomodoro timer (components/PomodoroView.tsx)

    • Work/break cycle configuration (default: 25m work, 5m break, 4 rounds, 15m long break)
    • Visual progress ring showing time remaining
    • Round counter (e.g., "Round 2 of 4")
    • Auto-transition between work and break
    • Session complete celebration

  • Dark + light theme

    • System preference detection (prefers-color-scheme)
    • Manual toggle in header
    • Theme persisted to localStorage
    • All components themed via CSS custom properties + Tailwind dark mode

  • PWA setup

    • Serwist service worker configuration
    • Web app manifest (name, icons, theme color, display: standalone)
    • Offline support: app shell cached, timers work offline
    • Install prompt UI ("Add to home screen" banner)
    • manifest.ts dynamic route for PWA manifest

  • Keyboard shortcuts

    • N — new timer
    • Q — quick timer modal
    • Space — start/pause active timer
    • Esc — dismiss alarm / close modal
    • ? — show shortcuts overlay

  • Landing page (app/page.tsx)

    • Hero: animated clock + tagline "Never be caught off-guard again"
    • 3 key features with icons (Pre-warnings, Visual Timeline, Smart Urgency)
    • "Try it now" button → app dashboard (no signup needed)
    • Social proof section (placeholder for future testimonials)
    • Footer: links, GitHub, privacy

Phase 1 Exit Criteria

  • PWA installs and works offline on Chrome, Safari, Firefox
  • Timer fires with cascade pre-warnings at correct times
  • Notifications work on desktop Chrome, Android Chrome
  • iOS Safari: tab title countdown works (notification best-effort)
  • Pomodoro completes full 4-round session correctly
  • Lighthouse PWA score > 90
  • Page load < 2 seconds
  • All Vitest unit tests pass
  • Deployed to Vercel/Netlify with custom domain
  • 5 beta testers using it daily

Phase 2: Intelligence — "Make It Smart" (Week 3-5)

Goal: Add the features that make ChronoMind irreplaceable — routines, NL input, focus mode, gamification. Success criteria: Users create routines and say "This replaced 3 apps for me."

Week 3: Routines + Linked Timers

  • Routine engine (lib/routines.ts)

    • Routine data model: ordered array of steps (label, duration, transition type)
    • Transition types: immediate, 1m break, 5m break, custom
    • Routine state machine: ready → step_1_active → step_1_transition → step_2_active → ... → complete
    • Auto-advance between steps with transition notification
    • Pause/resume entire routine (pauses current step timer)
    • Skip step button
    • Unit tests for multi-step routines with transitions

  • Routine editor (components/RoutineEditor.tsx)

    • Add/remove/reorder steps (drag-and-drop)
    • Per-step: label, duration, urgency, notes
    • Routine templates: Morning (5 steps), Evening Wind-down (4 steps), Cooking Prep (3 steps)
    • Save routine as template for reuse
    • Total duration display (auto-calculated)
    • Preview timeline of routine

  • Routine runner (components/RoutineRunner.tsx)

    • Full-screen routine execution view
    • Current step highlighted with countdown ring
    • Next step preview
    • Progress bar showing overall routine progress
    • Step transition animation (gentle slide)
    • "Done early" button to advance

  • Linked timers (lib/linked-timers.ts)

    • "When timer A ends, start timer B" relationship
    • Chain visualization in timeline
    • Linked timer presets: Pasta (boil water → add pasta → start sauce)
    • Cancel chain option (cancel one, option to cancel all linked)
    • Unit tests for chain execution

  • Natural language input (components/NLInput.tsx + lib/nl-parser.ts)

    • Integration with chrono-node for date/time parsing
    • Examples: "Standup in 30 minutes", "Wake up at 6:30am tomorrow", "Remind me at 3pm to call Mom"
    • Extract: time, duration, label, urgency hints ("important meeting" → Important)
    • Sticky input bar at top of dashboard
    • Parse preview: show parsed timer before confirming
    • Fallback: if parse fails, open manual create form with whatever was understood
    • Unit tests for 20+ natural language patterns

Week 4: Focus Mode + Stats

  • Focus mode (app/(app)/focus/)

    • Activate focus: choose duration or "until next timer"
    • Block all notifications except CRITICAL urgency
    • Full-screen focus view with minimal distraction
    • Ambient background sound options (rain, white noise, coffee shop) — Web Audio API
    • Integration with Pomodoro (focus mode auto-activates during work intervals)
    • Focus session summary on completion (time focused, distractions blocked)

  • Contextual pre-warning messages (lib/context-messages.ts)

    • Based on timer label, generate helpful prep messages
    • Rules engine: "meeting" → "Review your agenda", "flight" → "Check in online", "dentist" → "Leave in X minutes"
    • Keyword → message mapping (expandable, no LLM needed)
    • Custom messages per timer (user override)
    • Show in notification body and on timeline

  • Statistics + streaks (app/(app)/history/)

    • Timers created / completed / snoozed / dismissed — daily, weekly, monthly
    • On-time rate: % of timers acted on within 2 minutes of firing
    • Focus time: total hours in focus/Pomodoro mode
    • Current streak: consecutive days with at least 1 completed timer
    • Streak freeze: miss a day but keep streak (1 free freeze per week)
    • Weekly summary card (shareable — great for social/viral)
    • Charts: Recharts (line chart for trends, bar for daily breakdown)

  • Categories / tags

    • Built-in categories: Work, Personal, Health, Cooking, Exercise, Study
    • Custom tags
    • Filter timeline by category
    • Category-specific default urgency and cascade presets
    • Color-coded category indicators on timeline

  • Recurring timers (lib/recurrence.ts)

    • Recurrence rules: daily, weekday, weekend, weekly, biweekly, monthly, custom (select days)
    • Next occurrence calculation
    • "Skip next" and "Pause recurring" options
    • Recurring timer badge on timeline
    • Bulk edit: change all future occurrences
    • Unit tests for recurrence edge cases (month boundaries, DST, etc.)

Week 5: Calendar + Neurodivergent Mode + Polish

  • Calendar .ics import (lib/calendar-import.ts)

    • Parse .ics file (iCalendar format)
    • Import events as alarms with auto-generated cascade
    • Subscribe to calendar URL (re-fetch periodically)
    • Import preview: show events before confirming
    • Conflict detection: warn if imported event overlaps existing timer
    • Map calendar event priority to urgency level

  • Neurodivergent mode

    • Visual countdown ring (components/CountdownRing.tsx)
      • Large, animated circular countdown (inspired by Time Timer)
      • Color transitions: green → yellow → orange → red as time decreases
      • Optional: fill vs drain animation style
    • Gentle transition alerts (soft chime + visual pulse, not jarring alarm)
    • Reduced cognitive load: hide advanced options by default, progressive disclosure
    • Time blindness aids: "This is about as long as [familiar reference]" (e.g., "25 min — one TV episode")
    • Body doubling placeholder: "Focus with others" room (v2 feature, show coming soon)
    • Toggle in settings: "Gentle mode" (affects sounds, animations, notification style)

  • Prep time intelligence

    • Per-timer: "I need X minutes to prepare"
    • Auto-generates a prep warning: "Start preparing now — your meeting is in 20 minutes"
    • Prep time shown on timeline as a colored block before the timer
    • Smart defaults based on category (meeting → 10m, flight → 2h, cooking → 15m)

  • Adaptive snooze learning (lib/adaptive-snooze.ts)

    • Track snooze patterns per timer/category
    • After 5+ data points: "You always snooze your morning alarm 3 times. Set it 15 minutes later?"
    • Suggestion shown as dismissable card on dashboard
    • Accept → auto-adjusts recurring timer

  • Timer history (app/(app)/history/)

    • Searchable log of all past timers
    • Filter by category, urgency, date range
    • "Repeat" button to recreate a past timer
    • Export as CSV

  • Playwright E2E tests

    • Create alarm → verify it appears on timeline
    • Create countdown → verify it counts down → fires notification
    • Create routine → run through all steps
    • Pomodoro → complete 4 rounds
    • NL input → verify parsing
    • PWA install flow

Phase 2 Exit Criteria

  • Routines work end-to-end (create, run, complete, save as template)
  • NL input successfully parses 80%+ of natural time expressions
  • Focus mode blocks notifications during session
  • Streak tracking persists across sessions
  • Calendar .ics import works with Google Calendar exports
  • Neurodivergent mode noticeably gentler than default
  • All E2E tests pass in CI
  • 25+ beta testers, 3+ using routines daily
  • App Store / ProductHunt submission prepared

Phase 3: Apple Native — "Own the Wrist" (Week 6-9)

Goal: Ship native iOS + Apple Watch + macOS apps that make ChronoMind the best timer experience on Apple devices. Success criteria: Apple Watch complications are the #1 reason users love ChronoMind. Framework decision: Fully native SwiftUI (NOT KMP) — see platform analysis in PRD.

Week 6: iOS App Foundation

  • Xcode project setup

    • Multi-target Xcode project: ChronoMind (iOS), ChronoMindWatch (watchOS), ChronoMindMac (macOS)
    • Shared Swift package: Shared/ folder included in all targets
    • SwiftData for persistence (or Core Data if SwiftData has issues)
    • Dependency: none beyond Apple frameworks (zero third-party for v1)
    • Minimum deployment: iOS 17, watchOS 10, macOS 14

  • Timer engine Swift port (Shared/TimerEngine/)

    • Cascade.swift — port from cascade.ts
    • Urgency.swift — port from urgency.ts
    • Recurrence.swift — port from recurrence.ts
    • Scheduler.swift — port from timer-engine.ts
    • NLParser.swift — port from nl-parser.ts (use NSDataDetector + custom patterns)
    • ContextMessages.swift — port from context-messages.ts
    • XCTest unit tests mirroring all Vitest tests from web
    • Estimated effort: 2-3 days (~500-800 lines, logic is pure computation)

  • Data models (Shared/Models/)

    • CMTimer — SwiftData model matching web Timer interface
    • CMRoutine + CMRoutineStep
    • CMCategory
    • CMTimerHistory
    • CMUserPreferences
    • All models tagged with @Model for SwiftData

  • iOS screens

    • TimelineView — vertical timeline (main screen, tab 1)
    • CreateTimerView — alarm, countdown, pomodoro creation
    • QuickTimerSheet — bottom sheet with one-tap presets
    • RoutineListView + RoutineRunnerView
    • FocusView — focus/Pomodoro session
    • HistoryView — past timers, stats, streaks
    • SettingsView — preferences, categories, sounds, neurodivergent mode
    • Tab navigation: Timeline | Focus | History | Settings

  • Notification scheduling (Shared/Notifications/)

    • UNUserNotificationCenter for all pre-warnings
    • Schedule cascade notifications when timer is created
    • Critical alerts: request .criticalAlert authorization for CRITICAL urgency
    • Time Sensitive notifications for Important urgency
    • Custom notification sounds per urgency
    • Notification actions: Snooze 5m, Snooze 15m, Dismiss
    • Reschedule all notifications when timer is modified

  • Haptic engine

    • UIImpactFeedbackGenerator for pre-warning taps
    • Escalating haptic pattern matching urgency (gentle → standard → heavy)
    • Continuous haptic for Critical alarm (repeating pattern until dismissed)

Week 7: Apple Watch + Widgets

  • Apple Watch app (ChronoMindWatch/)

    • WatchTimelineView — compact timeline for wrist
    • WatchTimerDetailView — current timer with countdown ring
    • WatchQuickTimerView — one-tap presets on Watch
    • Digital Crown: scroll through upcoming timers
    • Haptic pre-warnings on wrist (gentle tap for early warnings, prominent for final)
    • Dismiss/snooze directly from Watch

  • Watch complications

    • WidgetKit complications for Watch faces
    • Circular: countdown to next timer
    • Rectangular: next timer label + time remaining
    • Inline: "Standup in 14m"
    • Corner: countdown ring
    • Update complications via WidgetCenter.shared.reloadAllTimelines()

  • Live Activities + Dynamic Island

    • ActivityKit Live Activity for active countdown/Pomodoro
    • Dynamic Island compact: timer name + countdown
    • Dynamic Island expanded: countdown ring + snooze/dismiss buttons
    • Lock Screen Live Activity: full countdown with cascade progress
    • Auto-start Live Activity when timer enters final 30 minutes
    • End Live Activity when timer is dismissed

  • iOS widgets (WidgetKit)

    • Small widget: next timer countdown
    • Medium widget: next 3 timers list
    • Large widget: mini timeline
    • Lock Screen widget: next timer inline
    • Widget tap → deep link to timer in app
    • Timeline provider: update every 5 minutes + on timer change

  • Siri Shortcuts

    • "Set a timer for 25 minutes" → creates countdown
    • "Start my morning routine" → starts saved routine
    • "What's my next timer?" → speaks next timer info
    • App Intents framework for iOS 17+
    • Shortcuts app integration

Week 8: macOS + AI Reschedule

  • macOS menu bar app (ChronoMindMac/)

    • Menu bar icon: shows countdown of next timer
    • Click → popover with mini timeline
    • Quick timer creation from popover
    • Notification center integration (native macOS notifications)
    • Keyboard shortcut: Cmd+Shift+T → quick timer
    • Share 90%+ code with iOS via Shared/ folder

  • AI reschedule

    • "I slept in 30 minutes" → shift all morning timers by 30m
    • "Skip my next timer" → remove + adjust linked/dependent timers
    • "Push everything back 1 hour" → bulk shift
    • Smart suggestions: detect when user dismisses alarm late → "Shift your morning by X minutes?"
    • Undo reschedule (keep old state for 1 hour)

  • Gamification polish

    • Streak badges: 7-day, 30-day, 100-day
    • Focus score: weekly score based on on-time rate + focus hours
    • Weekly summary card (shareable image — key for viral growth)
    • Gentle celebration animations (confetti for streak milestones, not obnoxious)

Week 9: Polish + TestFlight

  • Cross-device continuity

    • Handoff: start timer on Mac, see it on iPhone and Watch
    • iCloud sync for timer data (CloudKit)
    • Shared UserDefaults via App Groups (iPhone ↔ Watch ↔ Widget)

  • Accessibility

    • VoiceOver: all screens navigable, timer states announced
    • Dynamic Type: all text scales
    • Reduce Motion: disable animations when system setting is on
    • High Contrast mode support

  • XCTest + XCUITest

    • Unit tests for timer engine (mirroring web Vitest tests)
    • Unit tests for cascade, recurrence, NL parser
    • UI tests: create timer → verify timeline → fire → dismiss
    • Widget snapshot tests

  • TestFlight

    • Internal build: team testing
    • External beta: 100 testers via TestFlight link
    • Crash reporting: built-in MetricKit
    • Feedback form in Settings

Phase 3 Exit Criteria

  • iOS app installs and all features work on iPhone 14+ (iOS 17)
  • Apple Watch complications update correctly on Watch Series 8+ (watchOS 10)
  • Live Activities show on Dynamic Island and Lock Screen
  • Widgets update on home screen and lock screen
  • macOS menu bar app works on macOS 14+
  • Siri Shortcuts work for top 3 use cases
  • AI reschedule correctly shifts timers
  • All XCTests and XCUITests pass
  • TestFlight beta: 100 external testers, crash-free rate > 99%
  • App Store submission prepared (screenshots, description, keywords)

Phase 4: Context & Growth — "Make It Sticky" (Week 10-14)

Goal: Calendar sync, location awareness, sleep integration, and viral growth mechanics. Success criteria: Users say "ChronoMind knows my schedule better than I do."

Week 10-11: Calendar + Location

  • Full calendar sync

    • Google Calendar OAuth 2.0 integration
    • Apple Calendar (EventKit) read access
    • Outlook Calendar (Microsoft Graph API) integration
    • Two-way sync: imported events become timers with auto-cascade
    • Conflict resolution: calendar events take priority, manual timers preserved
    • Sync frequency: every 15 minutes + on-demand refresh
    • Visual distinction: synced events vs manual timers on timeline
    • Web: OAuth flow in Next.js API routes
    • iOS: EventKit for Apple Calendar, OAuth for Google/Outlook

  • Location-based triggers

    • iOS: CoreLocation geofencing (enter/exit region)
    • "Remind me when I leave home" → geofence exit trigger
    • "Remind me when I arrive at office" → geofence enter trigger
    • Saved locations: Home, Work, Gym (user-configured)
    • Privacy-first: all location processing on-device, no server tracking
    • Web: use Geolocation API (less reliable, best-effort)

  • Travel time intelligence

    • Apple Maps API (MapKit) for travel time estimates
    • "Your dentist appointment is in 45 minutes. Leave now — 28 min drive with current traffic."
    • Auto-adjust pre-warning cascade based on real-time travel time
    • Transport mode: driving, transit, walking (user preference per timer)
    • Web: fallback to static estimate (user enters travel time manually)

Week 12: Sleep + Wellness

  • Sleep integration

    • Bedtime routine: customizable wind-down sequence
    • Smart alarm: set a wake window (e.g., 6:30-7:00) → alarm fires at optimal time
    • Sleep tracking via HealthKit (Apple) — read sleep data, don't track directly
    • "You slept 6h 20m. Shift your morning by 15 minutes?" (AI reschedule tie-in)
    • Wind-down notifications: "Bedtime in 30 minutes — start winding down"
    • Blue light reminder: "Consider turning on Night Shift"

  • Mood/energy check-in

    • Quick check-in after completing a timer/routine: 😴 😐 😊 🔥 (4 energy levels)
    • Correlate mood with time of day, timer type, sleep data
    • Weekly insight: "You're most productive between 9-11 AM"
    • Optional: prompt at consistent times (morning, post-lunch, evening)
    • All data local — never sent to any server

  • Cloud sync (optional, privacy-first)

    • E2E encrypted sync via CloudKit (Apple) or custom API
    • Sync scope: timers, routines, categories, preferences, stats
    • Conflict resolution: last-write-wins with vector clocks
    • Opt-in: works perfectly offline, sync is a bonus
    • Web: sync via authenticated API (JWT + encrypted payload)
    • Delete account: wipes all cloud data immediately

Week 13-14: Viral Growth Mechanics

  • Shareable weekly summary

    • Auto-generated card: "This week: 47 timers completed, 12h focused, 14-day streak 🔥"
    • Beautiful design (dark bg, accent colors, ChronoMind branding)
    • Share to: Instagram Stories, Twitter/X, LinkedIn, iMessage
    • Deep link back to ChronoMind (UTM tracked)
    • This is the #1 viral mechanic — make it irresistible to share

  • Shareable timer

    • Create a timer and share link: "chronom.ind/t/abc123"
    • Recipient opens link → timer auto-added to their ChronoMind
    • Use case: "Here's the pasta recipe timing" / "Here's our meeting prep timer"
    • Web link works without app (PWA fallback)
    • iOS: Universal Link → opens app directly

  • Referral program

    • "Invite a friend → both get 1 month Pro free"
    • Unique referral code per user
    • Track referral chain
    • Show referral count in profile

  • ProductHunt launch prep

    • Maker profile + product page
    • Launch video (30s demo: create timer → cascade fires → Watch notification)
    • 5 key screenshots (timeline, Watch, Dynamic Island, routine, focus)
    • First comment prepared (story of why this exists)
    • Schedule for Tuesday 12:01 AM PT (optimal PH launch time)

  • App Store Optimization (ASO)

    • Keywords: "smart timer", "pre-warning alarm", "visual timeline", "focus timer", "routine timer", "ADHD timer", "pomodoro"
    • 10 screenshots: iPhone (6.7" + 6.1"), iPad, Apple Watch, Mac
    • App preview video (15-30s)
    • Subtitle: "Smart Pre-Warning Timer & Routines"
    • Category: Productivity (primary), Lifestyle (secondary)

  • Content marketing

    • Blog post: "Why I Built ChronoMind — The Timer App That Understands Urgency"
    • Twitter/X thread: "I analyzed every timer app. Here's what they all get wrong. 🧵"
    • Reddit posts: r/productivity, r/ADHD, r/apple, r/webdev
    • Hacker News: "Show HN: ChronoMind — AI-powered pre-warning timer (PWA + iOS)"
    • YouTube: 3-minute walkthrough video

  • SEO landing page

    • Target pages: "best timer app 2026", "ADHD timer app", "pre-warning alarm app"
    • Comparison pages: "ChronoMind vs Tiimo", "ChronoMind vs Structured"
    • Blog with timer/productivity tips (SEO content)

Phase 4 Exit Criteria

  • Calendar sync works with Google, Apple, Outlook calendars
  • Location triggers fire reliably (iOS geofencing)
  • Travel time estimates adjust pre-warning cascade
  • Sleep data integration working via HealthKit
  • Weekly summary card shareable to 3+ social platforms
  • Shareable timer links work (web + iOS universal link)
  • ProductHunt page live, launch scheduled
  • App Store listing approved and live
  • 500+ users (web + iOS combined)
  • 4.5+ star rating on App Store (from beta testers)

Phase 5: Android + Scale — "Reach Everyone" (Week 15-22)

Goal: Ship Android + Wear OS, shared timers, and reach product-market fit. Success criteria: 5,000 MAU, 4.5+ stars on both App Store and Play Store.

Week 15-17: Android App

  • Android project setup

    • Jetpack Compose + Material 3 + Kotlin
    • Room database (mirroring SwiftData schema)
    • Hilt for dependency injection
    • Minimum SDK: API 26 (Android 8.0)
    • Gradle version catalog for dependency management

  • Timer engine Kotlin port (TimerEngine/)

    • Port from Swift (which was ported from TypeScript) — all same logic
    • Cascade.kt, Urgency.kt, Recurrence.kt, Scheduler.kt, NLParser.kt
    • JUnit5 tests mirroring XCTest and Vitest tests
    • Estimated effort: 2-3 days (same as Swift port)

  • Android screens (Jetpack Compose)

    • TimelineScreen — vertical timeline
    • CreateTimerScreen — alarm, countdown, Pomodoro
    • RoutineScreen — list + runner
    • FocusScreen — focus/Pomodoro session
    • HistoryScreen — stats, streaks, history
    • SettingsScreen — preferences, categories, neurodivergent mode
    • Bottom navigation matching iOS tab structure

  • Android notifications

    • AlarmManager for exact alarm scheduling (pre-warnings)
    • Notification channels per urgency level
    • Full-screen intent for CRITICAL urgency
    • Notification actions: Snooze, Dismiss
    • Foreground service for active countdown display
    • SCHEDULE_EXACT_ALARM permission handling (Android 12+)

  • Android widgets

    • Glance widgets (Jetpack Glance)
    • Small: next timer countdown
    • Medium: next 3 timers
    • Large: mini timeline
    • Widget tap → deep link to timer

  • Android-specific features

    • Quick Settings tile: one-tap to create quick timer
    • Persistent notification during active timer
    • DND integration: timer-aware Do Not Disturb
    • Google Calendar integration (CalendarContract)

Week 18-19: Wear OS + Polish

  • Wear OS app

    • Compose for Wear OS
    • WearTimelineScreen — scrollable timeline
    • WearTimerScreen — countdown with rotary input
    • Tile: next timer complication
    • Haptic pre-warnings
    • Dismiss/snooze from wrist

  • Cross-platform cloud sync

    • Sync API: REST endpoints for timer CRUD + sync
    • JWT authentication (reuse from web)
    • E2E encryption: client-side encrypt before upload
    • Sync protocol: last-write-wins with conflict detection
    • Works across: Web ↔ iOS ↔ macOS ↔ Android
    • Account creation: email + password or Apple/Google Sign-In

Week 20-21: Shared Timers + Social

  • Shared timers (Family/Household)

    • Create a "household" group (invite via link)
    • Shared timers visible to all household members
    • Real-time sync: one person starts timer, everyone sees it
    • Use cases: "Dinner in 30 minutes", "Leave for school in 15 min"
    • Per-timer: shared vs private toggle
    • Household admin: manage members, remove shared timers
    • Up to 6 members per household (Family tier)

  • Body doubling / shared focus (experimental)

    • "Focus room" — join a virtual co-working session
    • See other participants' focus timers (anonymized)
    • Accountability: "3 people are focusing with you"
    • Optional: audio ambiance shared in room
    • Join public rooms or create private (link invite)

  • API + webhooks

    • REST API: CRUD timers, routines, categories
    • API key authentication
    • Webhook: timer.fired, timer.dismissed, routine.completed
    • Use cases: Zapier integration, smart home triggers
    • Rate limiting: 100 requests/minute per API key

  • Smart Home integration

    • Webhook-based triggers to HomeKit/Alexa/Google Home
    • "When wind-down routine starts → dim lights to 30%"
    • "When morning alarm fires → turn on coffee machine"
    • Shortcuts integration (iOS) for HomeKit scenes
    • IFTTT applet for cross-platform home automation

Week 22: Launch + Scale

  • Google Play launch

    • Play Store listing (screenshots, description, video)
    • Play Store Optimization (similar keywords as App Store)
    • Internal testing → Open testing → Production
    • Crash reporting: Firebase Crashlytics

  • Monetization activation

    • Free tier: all core features, local storage, Pomodoro, routines
    • Pro tier ($3.99/mo or $29.99/yr): cloud sync, calendar integration, custom sounds, AI reschedule, advanced stats, location triggers
    • Family tier ($5.99/mo): shared timers (up to 6 members), household coordination
    • Stripe integration (web), StoreKit 2 (iOS), Google Play Billing (Android)
    • Paywall: soft — show feature, explain it's Pro, easy upgrade
    • 7-day free trial for Pro

  • Voice control (v2 feature)

    • In-app voice: "Push everything back 30 minutes"
    • Siri Shortcuts (already done in Phase 3)
    • Google Assistant Actions
    • Alexa Skill (stretch goal)

  • Performance + scale

    • Web: Core Web Vitals all green
    • iOS: 60fps animations, < 50MB app size
    • Android: 60fps, < 40MB APK
    • Watch: complications update within 15 minutes
    • Sync API: < 200ms p99 latency
    • 10,000 MAU target infrastructure

Phase 5 Exit Criteria

  • Android app live on Google Play, 4.5+ stars
  • Wear OS app functional on Pixel Watch / Galaxy Watch
  • Cross-platform sync working (web ↔ iOS ↔ Android)
  • Shared timers working for households (up to 6 members)
  • API + webhooks functional for automation
  • Monetization: Pro + Family tiers active, > 5% conversion rate
  • 5,000+ MAU across all platforms
  • < 0.1% crash rate on all platforms
  • Customer support: < 24h response time

Success & Viral Playbook

Metrics That Matter

Metric MVP Target v1 Target v2 Target
MAU 50 1,000 5,000
DAU/MAU ratio > 40% > 50% > 50%
Pre-warning usage > 60% of timers > 70% > 75%
Routine creation > 20% of users > 30% > 35%
7-day retention > 30% > 40% > 50%
30-day retention > 15% > 25% > 30%
App Store rating — 4.5+ 4.5+
Pro conversion — > 3% > 5%
Streak > 7 days — > 15% of users > 25%
Shared summary — > 10% weekly > 20%

Viral Growth Loops

Loop 1: Weekly Summary Share
User completes week → Beautiful summary card generated → Shares to social → 
Friend sees → Clicks link → Downloads ChronoMind → Repeat

Loop 2: Shared Timer
User creates timer → Shares link with friend/family → Friend opens link →
Timer auto-added → Friend discovers app → Downloads → Repeat

Loop 3: Household Invite
User activates Family plan → Invites household → Members join → 
Members invite THEIR friends → Organic growth

Loop 4: Content / SEO
User writes about experience → Blog/Reddit/Twitter → Organic search →
New user finds ChronoMind → Downloads → Repeat

What Makes ChronoMind Go Viral

  1. The "aha" moment — First time a pre-warning fires and user thinks "I would have been late without this." Target: within first 24 hours of use.

  2. Shareable summaries — Weekly stats card must be beautiful enough that users want to share it. Design it like a Spotify Wrapped card. Include streak count, focus hours, on-time rate.

  3. Apple Watch as walking billboard — When someone glances at their Watch and sees a ChronoMind complication, their friend asks "What's that?" Word of mouth.

  4. Routine templates — "I use ChronoMind's Morning Routine template and it changed my life" → shareable templates that spread.

  5. Neurodivergent community — The ADHD community is vocal and supportive online. If ChronoMind genuinely helps with time blindness, they'll evangelize it. Target: r/ADHD, ADHD TikTok, ADHD Twitter.

  6. ProductHunt launch — Target top 5 on launch day. Prepare months in advance with a supporter base.

  7. "Replace 3 apps" narrative — Position ChronoMind as replacing Clock + Pomodoro + Routine app. Users love consolidation stories.

Pricing Strategy for Growth

Phase 1-2 (Web MVP):     100% free — no friction, maximum adoption
Phase 3 (iOS launch):    100% free — build App Store momentum and reviews
Phase 4 (Growth):        Introduce Pro — soft paywall on advanced features
Phase 5 (Scale):         Pro + Family — monetize power users and households

Free forever:            Timers, alarms, countdowns, Pomodoro, routines,
                         visual timeline, pre-warnings, neurodivergent mode,
                         stats, streaks, categories, keyboard shortcuts

Pro ($3.99/mo):          Calendar sync, location triggers, cloud sync,
                         custom sounds, AI reschedule, advanced analytics,
                         travel time, export, priority support

Family ($5.99/mo):       Everything in Pro + shared timers (6 members),
                         household coordination, family routines

Risk Register

# Risk Severity Phase Mitigation
1 PWA notifications unreliable on iOS High 1 Tab title countdown + native iOS app in Phase 3
2 Feature creep delays MVP High 1-2 Strict scope: alarm + countdown + Pomodoro only for Phase 1
3 Apple Watch complications don't update reliably Medium 3 Budget for watchOS debugging; use TimelineProvider with aggressive updates
4 Calendar OAuth complexity Medium 4 Start with .ics import (Phase 2); full OAuth only in Phase 4
5 Competition adds pre-warnings Medium All Ship fast; cascade + urgency + linked timers is hard to replicate
6 Low App Store visibility Medium 3-4 ASO from day 1; ProductHunt launch; content marketing
7 Sync conflicts across platforms Medium 4-5 Start with iCloud (Apple-only); cross-platform sync in Phase 5
8 Android notification restrictions (Doze, exact alarms) Medium 5 Use AlarmManager.setExactAndAllowWhileIdle(); request permissions
9 User overwhelm — too many features Medium 2+ Progressive disclosure; smart defaults; "simple mode" toggle
10 Monetization too early kills growth Low 4 Free for 3 phases; only monetize when PMF is proven

Key Milestones & Dates

Milestone Target Date Phase Celebration
MVP shipped (web PWA live) Week 2 1 First 10 users 🎉
Intelligence complete (routines, NL, focus) Week 5 2 ProductHunt scheduled
iOS + Watch on TestFlight Week 9 3 100 beta testers
App Store launch Week 10 3→4 ProductHunt same week
1,000 MAU Week 14 4 Blog post celebrating
Android launch Week 18 5 Play Store live
5,000 MAU Week 22 5 Series of viral pushes
Monetization live Week 20 5 Pro + Family tiers

Appendix: Tech Stack Summary

Platform Framework Key Libraries Storage Notifications
Web Next.js 16, React 19 TailwindCSS v4, shadcn/ui, Zustand, Serwist, chrono-node, date-fns, Recharts IndexedDB (idb) Web Push + Service Worker
iOS SwiftUI (iOS 17+) SwiftData, WidgetKit, ActivityKit, EventKit, CoreLocation SwiftData UNUserNotificationCenter
watchOS SwiftUI (watchOS 10+) WidgetKit (complications), ClockKit App Groups shared WKExtension notifications
macOS SwiftUI (macOS 14+) AppKit (menu bar) SwiftData (shared via iCloud) NSUserNotificationCenter
Android Jetpack Compose Material 3, Room, Hilt, Glance (widgets), AlarmManager Room (SQLite) NotificationManager + AlarmManager
Wear OS Compose for Wear OS Tiles, Complications, Rotary Input Room (shared) Wearable notifications
Sync API TBD (Fastify or Cloudflare Workers) JWT auth, E2E encryption Cosmos DB or D1 —