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Wortmühle

Daily German word puzzle — 9 letters, one pangram, fully offline
New in version 1.2
The app now requests no permissions at all — the network permission is gone too. Word definitions ship inside the app and work offline; tap the Wiktionary link to read more in your browser.

The puzzle pool was revised: unwanted solution words are gone, along with proper names and incorrectly generated word forms. As a result the daily puzzles shift once — a puzzle you already solved today may be a new one after the update.
Wortmühle ("word mill") is a daily German word puzzle: build as many German words as you can from the nine letters on the 3×3 mill board. Every word must use the center letter, and every puzzle contains at least one pangram — a word using all nine letters.

Features:

• One new puzzle every day, with the last seven days replayable
• 2500 puzzles built in — one a day for almost seven years, fully offline
• Scoring based on German Scrabble letter values, with a pangram bonus
• Tap a found word for its definition — bundled, no network needed
• Light/dark mode selectable (follows the system otherwise)
• No permissions, no tracking, no ads, no accounts, no Google services

The app requests no permissions at all and never touches the network. The definitions ship with it: they come from de.wiktionary.org, are licensed CC BY-SA 4.0 and are shortened to the first two senses. Each definition carries a link to its Wiktionary page — tapping it opens your browser.

Note: the game and its vocabulary are entirely in German. The word list is derived from free sources (igerman98 word list, de.wiktionary, OpenSubtitles frequency data).
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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
  • Version 1.2 (3) suggested Added on Aug 23, 2026

    This version requires Android 5.1 or newer.

    It is built and signed by F-Droid, and guaranteed to correspond to this source tarball.

    No permissions

    Download APK 3.8 MiB PGP Signature | Build Log

    • New in version 1.1
    New settings (gear icon): system/light/dark theme and word definitions. The online lookup via de.wiktionary.org is now opt-in and off by default — the app never touches the network unless you enable it.
  • Version 1.1 (2) - Added on Aug 03, 2026

    This version requires Android 5.1 or newer.

    It is built and signed by F-Droid, and guaranteed to correspond to this source tarball.

    Permissions
    • have full network access
      Allows the app to create network sockets and use custom network protocols. The browser and other applications provide means to send data to the internet, so this permission is not required to send data to the internet.
    • de.huepping.wortmuehle.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION

    Download APK 3.2 MiB PGP Signature | Build Log

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