diff --git a/android/.gitignore b/android/.gitignore
new file mode 100644
index 0000000..6eec72f
--- /dev/null
+++ b/android/.gitignore
@@ -0,0 +1,12 @@
+*.iml
+.gradle
+/local.properties
+/.idea
+.DS_Store
+/build
+/app/build
+/wear/build
+/captures
+.externalNativeBuild
+.cxx
+local.properties
diff --git a/android/gradle.properties b/android/gradle.properties
new file mode 100644
index 0000000..f0a2e55
--- /dev/null
+++ b/android/gradle.properties
@@ -0,0 +1,4 @@
+org.gradle.jvmargs=-Xmx2048m -Dfile.encoding=UTF-8
+android.useAndroidX=true
+kotlin.code.style=official
+android.nonTransitiveRClass=true
diff --git a/android/gradle/wrapper/gradle-wrapper.properties b/android/gradle/wrapper/gradle-wrapper.properties
new file mode 100644
index 0000000..e2847c8
--- /dev/null
+++ b/android/gradle/wrapper/gradle-wrapper.properties
@@ -0,0 +1,7 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.11.1-bin.zip
+networkTimeout=10000
+validateDistributionUrl=true
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
diff --git a/docs/roadmap.md b/docs/roadmap.md
index 419f8ee..68ac259 100644
--- a/docs/roadmap.md
+++ b/docs/roadmap.md
@@ -797,11 +797,11 @@ ChronoMind ships in **5 phases over ~6 months**, from web MVP to full cross-plat
   - [x] Large: mini timeline (4x3)
   - [x] Widget tap → `actionStartActivity<MainActivity>`
 
-- [ ] **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)
+- [x] **Android-specific features**
+  - [x] Quick Settings tile: `QuickTimerTileService` — one-tap to create timer
+  - [x] Persistent notification: `TimerForegroundService` with stop action
+  - [ ] DND integration: timer-aware Do Not Disturb (deferred)
+  - [ ] Google Calendar integration (CalendarContract) (deferred)
 
 ### Week 18-19: Wear OS + Polish