HA Alarm Clock review
A free, open-source Android clock app with alarms, timers, and optional Home Assistant controls.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
HA Alarm Clock is an open-source Android app for people who want everyday clock tools on their phone, with optional Home Assistant synchronization. Its alarm schedules can repeat on selected days and include labels, ringtones, vibration, and gradual volume increase. The app also provides countdown timers, a lap-recording stopwatch, an offline world clock with searchable time zones, and home-screen clock widgets. Alarm data is stored and scheduled on the phone, so the core clock functions work offline. It is aimed at individual Android users rather than teams or a broader smart-home platform audience.
Home Assistant is the app’s key ecosystem distinction. Synchronization is optional; when enabled, alarm state can sync and the integration exposes controls and sensors for automations. Home Assistant can also send alarm commands to the phone. This makes the app a fit for users who already want alarm actions connected to their Home Assistant setup, while users who only need standalone alarms can use the local features without that integration. The published description focuses on clock and automation functions rather than sleep tracking or challenge-based alarm dismissal.
Distribution and device requirements are worth considering before choosing it. HA Alarm Clock requires Android 8.0 or newer and is distributed as an APK through GitHub Releases, rather than being described as available through an app store. Its open-source model and free plan suit users comfortable installing an Android package and, if desired, connecting Home Assistant. Choose another alarm app if you need documented sleep features or alarm challenges, or if APK installation does not fit your preferences. For a free, offline clock with a Home Assistant option, its focused set of alarms, timers, stopwatch, world clock, and widgets covers the central use case.
HA Alarm Clock pros and cons
- Where it wins
- Repeat-day alarms include labels, ringtones, vibration, and gradual volume increase.
- Timers, a lap-recording stopwatch, offline world clock, and widgets are included.
- Optional Home Assistant sync supports alarm controls, sensors, and incoming commands.
- Where it doesn't
- Requires Android 8.0 or newer.
- Distributed as an APK through GitHub Releases.
- No verified sleep or alarm-challenge features are described.
HA Alarm Clock fact sheet, pricing and score →
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