All your calendars in one private app on Android.
Official Repository: This is the only official KashCal™ source. Only download from F-Droid, IzzyOnDroid, or GitHub Releases. Beware of copies distributing APKs from other sources.
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Family stuff on iCloud. Holidays from some website. Birthdays buried in your contacts. Work on Nextcloud. KashCal brings them together on your Android. No account required, no analytics, no telemetry.
- iCloud: Switched to Android but your family is still on Apple? Sync with iCloud calendars directly. No workaround needed.
- CalDAV: Nextcloud, Radicale, Baïkal, Stalwart, FastMail, Zoho, and more. Native sync, no middleware.
- Device calendar: See events from your phone's built-in calendar alongside everything else.
- Holidays & schedules: Subscribe to any ICS calendar. Holidays, school schedules, sports seasons.
- Birthdays: Pulls from your contacts automatically.
- Local: Don't need sync? Works fully offline out of the box.
Material You with dynamic theming. Home screen widgets. Full-text search across all events. Per-event timezone for travel.
No analytics, no tracking, no KashCal account required. Data is stored locally unless you explicitly set up sync.
- Fort Knox Mode: other apps have no access to your events
- Encrypted credentials via Android Keystore (AES-256-GCM)
- HTTPS only: cleartext traffic blocked
- No WebViews: native UI only
- Minimal permissions: only what's necessary
- Fully auditable: open source codebase
| Provider | Status | Tested By |
|---|---|---|
| iCloud | ✓ | @one-kash |
| Nextcloud | ✓ | @one-kash @dev-inside |
| Baïkal | ✓ | @one-kash |
| Baïkal (Digest Auth) | ✓ | @englut |
| Radicale | ✓ | @one-kash |
| mailbox.org | ✓ | @h1nnak |
| Infomaniak | ✓ | @dirko-madrileno |
| Stalwart | ✓ | @OneCreek |
| FastMail | ✓ | @mittensicle |
| Davis | ✓ | @Ivan-Roger |
| Zoho | ✓ | @jopacy |
Found a CalDAV server that doesn't work? Let us know!
For Developers
| Category | Technology |
|---|---|
| CalDAV/ICS | iCalDAV |
| UI | Jetpack Compose, Material 3 |
| Widgets | Jetpack Glance |
| Database | Room + FTS4 full-text search |
| Security | Android Keystore (AES-256-GCM) |
| DI | Hilt |
| Async | Kotlin Coroutines + Flow |
| Background | WorkManager |
| Network | OkHttp |
git clone https://github.com/KashCal/KashCal.git
cd KashCal
./gradlew assembleDebug- Android Studio (latest stable)
- JDK 17
- Android SDK 35
See CONTRIBUTING.md for guidelines.