Privacy Policy — Clockula

Last updated: 2 October 2026
Applies to the Android app Clockula (package de.jeanlucmakiola.clockula), all versions and all distribution channels.

In short

Clockula collects nothing, sends nothing, and has no user accounts. It has no internet permission, so it cannot transmit your data anywhere. Your alarms, timers and world clocks are stored on your device and nowhere else.

1. Controller

IT-Dienstleister | Jean-Luc Makiola
Mahlerstraße 10
14772 Brandenburg an der Havel
Email: support@jeanlucmakiola.de

2. No data collection

Clockula contains no analytics, tracking, advertising, crash-reporting SDK or third-party service of any kind. It creates no user profile and generates no identifier, and it shares or sells no data to anyone.

The app does not request the android.permission.INTERNET permission, and without it Android does not let an app open a network connection. You can check this yourself in the permission list of any released APK, or in the source code.

3. Data Clockula keeps on your device

Everything below is processed locally on your device. None of it is transmitted, and the developer never receives or stores any of it.

Alarms, timers, stopwatch and world clocks

Clockula keeps its own database in the app’s private storage. It holds your alarms (time, repeat days, label, sound and similar options), your timers and their labels, the stopwatch and its laps, and the list of cities you added as world clocks. No other app can read this database. Uninstalling Clockula deletes it.

World clock times are calculated from the time zone data built into Android. Adding a city does not look anything up online.

Other apps setting alarms

Clockula supports Android’s standard alarm interface, so a voice assistant or automation app can set, show or dismiss alarms and timers in Clockula. Android only lets apps that declare the SET_ALARM permission do this. Clockula receives what that app sends (for example a time and a label) and stores it like an alarm you created yourself. It sends nothing back beyond the result of the request.

Alarm and timer sounds

You can choose one of the ringtones that come with your device, or pick your own audio file through Android’s system file picker. Clockula can then read exactly that file, so it can play it when the alarm rings. It has no access to your other files.

You can also let a music app on your device play the alarm. Clockula then sees which installed apps share their music library through Android’s standard media interface, and nothing else about your installed apps. When you browse one, Clockula reads the folder and track names that app chooses to share and stores the item you pick. When the alarm rings, Clockula asks that app to play it. The music app plays it with its own permissions and under its own privacy policy. If it streams the music, the music app opens that connection, not Clockula. Clockula still has no internet access.

Notifications and the lock screen

Alarms, timers and the running stopwatch appear as local notifications, and a ringing alarm can show a full-screen view over the lock screen. Android also shows your next alarm in the status bar and on the lock screen. None of this uses a push service.

Home-screen widgets

The widgets show data from Clockula’s own database, such as your next alarm, a running timer or the stopwatch. Each widget’s style and settings are stored on your device.

Backup files

Clockula can export your alarms, timers, world clocks and settings to a clockula-backup-v1.json file in a folder you pick, and import such a file again. The app reads and writes only the folder or file you select through Android’s system file picker. The file contains your alarm and timer labels, so treat it like any other personal file when you move or share it.

App settings

Your preferences (theme, language, snooze length, default sounds and similar) are stored on your device and are removed when you uninstall the app.

4. Android backup

If Android Auto Backup is turned on for your device, Android may back up Clockula’s database and settings to your own Google account, under Google’s terms. The developer has no access to that backup. You can turn Auto Backup off in your device’s system settings.

5. Crash reports: the only case where data can leave your device

If Clockula crashes, it offers to report the problem. It never sends anything on its own. The report is copied to your clipboard and your browser opens the project’s issue tracker with the text filled in. You can read the full report, edit it, or discard it, and nothing is submitted unless you submit it.

The report contains:

• the app version,
• the Android version,
• the device manufacturer and model,
• your device language,
• the time of the crash,
• and the technical stack trace.

It contains no alarms, timers, labels or other personal data.

If you submit it, the report becomes a public issue on the project’s issue tracker at Codeberg, which Codeberg e. V. operates. Their privacy policy applies to that submission.

6. External links

The settings screen links to the source code, the licence, the issue tracker and a voluntary donation page (Ko-fi). The “Why might my alarm not ring?” check can also link to dontkillmyapp.com, which explains battery restrictions for your phone’s manufacturer. Opening any of these links starts your browser and leaves the app, and the privacy policy of that website applies from then on. Clockula only opens the address and sends no data of yours with it.

7. Permissions and why they exist

• USE_EXACT_ALARM, SCHEDULE_EXACT_ALARM: ring alarms and timers at the exact time.
• RECEIVE_BOOT_COMPLETED: schedule the next alarm again after the phone restarts.
• USE_FULL_SCREEN_INTENT: show the ringing alarm over the lock screen.
• POST_NOTIFICATIONS, POST_PROMOTED_NOTIFICATIONS: show alarm, timer and stopwatch notifications, including the live timer in the status bar.
• FOREGROUND_SERVICE, FOREGROUND_SERVICE_SYSTEM_EXEMPTED, FOREGROUND_SERVICE_SPECIAL_USE: keep a ringing alarm, a running timer or the stopwatch going while the app is in the background.
• WAKE_LOCK: keep the phone awake while an alarm or timer rings.
• VIBRATE: vibrate when an alarm or timer rings.
• ACCESS_NETWORK_STATE: added by the Android library that updates the home-screen widgets (WorkManager). It lets an app see whether a network connection exists. It does not let it use one, and without INTERNET no connection is possible.

8. Distribution channels

Clockula is distributed through the project’s releases on Codeberg, a self-hosted F-Droid repository, Obtainium and, where available, F-Droid and the Google Play Store. When you download or update the app, the operator of that channel processes data such as your IP address under its own privacy policy. The developer has no control over this, and it is separate from what the app itself does.

9. Children

Clockula is suitable for all ages. It collects no data from anyone, children included.

10. Your rights

The developer processes no personal data of yours, so there is no stored data to which the rights of access, rectification, erasure, restriction, data portability or objection (Art. 15–21 GDPR) could apply. You can still contact the address above with any question, and you have the right to lodge a complaint with a supervisory authority.

11. Changes to this policy

If a change to the app affects how it handles data, this policy will be updated and the date at the top changed. The history of this file is public in the project’s repository.