Clock

Clock is an AOSP-derived alarm and time app with substantially more control than a basic desk clock. It combines dated alarms, world clocks, multiple timers, a stopwatch, screensaver modes, quick-settings tiles and configurable widgets. Version 2.34 adds alarm categories, locked alarms and alarm-specific time zones alongside reliability fixes.

This page is based on the 2.34 source tag and a static inspection of the F-Droid APK. We did not leave alarms running overnight on different phone brands, so device-specific reliability remains an upstream claim rather than a result of our own hardware test.

Alarm controls beyond a weekly schedule

An alarm can target a specific date or time zone instead of only repeating on selected weekdays. Version 2.34 can group alarms into user-created categories, assign an alarm to more than one category and lock selected alarms against editing or swipe deletion. Alarm categories start disabled until enabled in settings. The release also adds a snooze interval measured in days, up to 31.

When an alarm sounds, optional dismissal or snooze actions include flipping or shaking the device, pressing the power or volume buttons, or solving a math problem. Titles, backgrounds and ringtones are configurable. Random mode chooses either from all system alarm sounds or from all custom ringtones the user has added; it does not create smaller selectable groups.

On relevant Android versions, the app’s required-access screen checks notifications, exemption from battery optimisation and, on Android 14 or later, full-screen notification access. Exact alarms use USE_EXACT_ALARM, which Android grants at installation; the older special-access permission is declared only through Android 12L, so the user does not need a separate exact-alarm approval for this build. Android vendors can still impose their own background restrictions. The developer specifically documents extra setup for MIUI and ZTE devices. First launch also shows a “Keep Android Open” notice that can only be acknowledged with OK.

Clocks, timers and local data

The clock tab supports digital or analogue layouts, multiple cities and a separate home-time display while travelling. Timers and the stopwatch keep notifications while running; on Android 16 and later, version 2.34 can optionally use live-update notifications. Stopwatch results can be shared as text. Android backup is disabled, so moving data between installations requires the app’s own exported ZIP; custom ringtone files are not included.

The APK declares no internet permission, and our scan found no known tracker SDKs. Its 16 declared permissions instead cover alarm delivery, vibration, audio control, notifications, boot recovery, an optional flashing-light alert and device-specific power-off-alarm handling. The latter has no app switch: Clock automatically sends the next alarm time to the Qualcomm power-off-alarm component when that component exists. It is limited to some Snapdragon phones and is not guaranteed even on a supported-looking device.

Version 2.34 also fixes an issue where an alarm might not stop after dismissal or snooze on affected devices, a timer crash when its ringtone is missing, and crashes in the screensaver. Those are the developer’s release notes, not evidence that every manufacturer’s alarm restrictions have been tested.

About this file

• Version 2.34, build 2038, is 7.3 MB, needs Android 6.0 or later and contains no native CPU-specific libraries.
• Its SHA-256 is 631e4bbfd28225da87c768dfb2062a0b3efc717e1e132d60a1e0408da308f7ff, matching F-Droid’s signed index. F-Droid signs this build; it is not byte-identical to the developer-signed GitHub APK.
• The repository declares Clock GPL-3.0, while AOSP-derived source files carry Apache-2.0 in their headers; F-Droid’s metadata labels the package Apache-2.0. Both licence files are present upstream. The bundled clock.ttf name table says “All rights reserved”; an accompanying note attributes its icon glyphs to Apache-2.0 Material Icons, but the repository gives the font itself no separate licence.

Versions currently kept in the F-Droid repository. We host and check only the newest one.