Libellus Potionis
New: a year heat-map in the calendar, the running abstinence on Today, a statistics period you can page through, and alcohol-free days that break no streak. Tapping a drink in edit mode opens the editor.
Plus fixes to paging, time zones and the report.
KEY FEATURES
• Logging: Predefine your own beverages or pick from internationally common presets. Log drinks instantly or retroactively with timestamp corrections.
• Concurrent limits: Set three boundaries at once — a daily limit (grams of pure alcohol), a rolling 7-day weekly limit (grams), and a maximum number of drinking days per week. Each has its own progress bar.
• Blood alcohol concentration (BAC): Enter your body weight to get a live estimate from the Widmark formula.
• Counseling reports: Generate a two-page PDF report of your consumption for consultations and counseling appointments.
• Data portability: Export your dataset as a CSV file for external processing (e.g. in LibreOffice Calc), or create JSON backups to move data between devices.
• Adjustments: Set your own “day start” time, so that late-night drinks count toward the preceding evening, and an evaluation start date for a clean restart, e.g. on New Year’s Eve.
A User’s Guide is available inside the app.
PRIVACY & SECURITY
The app stores only what you enter. It holds no network permission, so it is incapable of network access and your data cannot leave the device by itself. Your data stays in the app’s private storage, protected at rest by Android’s device storage encryption and the app sandbox. An optional biometric fingerprint lock guards against unauthorized physical access. There is no tracking, no analytics and no cloud synchronization.
COMPATIBILITY
The app runs on Android 11 (API 30) and newer and is also available for iOS 17 and newer.
OPEN SOURCE
Libellus Potionis is free software released under the GNU General Public License v3 (or later). The source code is available at the project homepage.
- Author: Martin A. Godisch
- License: GNU General Public License v3.0 or later
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Versions
Although APK downloads are available below to give you the choice, you should be aware that by installing that way you will not receive update notifications and it's a less secure way to download. We recommend that you install the F-Droid client and use that.
Download F-Droid-
arm64-v8aarmeabi-v7ax86x86_64This version requires Android 11 or newer.
It is built and signed by the original developer, and guaranteed to correspond to this source tarball.
Download APK 4.6 MiB PGP Signature | Build Log
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arm64-v8aarmeabi-v7ax86x86_64This version requires Android 11 or newer.
It is built and signed by the original developer, and guaranteed to correspond to this source tarball.
Download APK 4.4 MiB PGP Signature | Build Log
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arm64-v8aarmeabi-v7ax86x86_64This version requires Android 11 or newer.
It is built and signed by the original developer, and guaranteed to correspond to this source tarball.
Download APK 4.4 MiB PGP Signature | Build Log
The PDF report keeps the six most recent months and sums up everything older, its weekday columns follow the report's language, and day counts use each language's plural form.