Quick answer
Einstein's Riddle (also known as the Zebra Puzzle)
F-Droid repository metadata
FEATURES:
- 100% Privacy: Fully offline play. No data collection, tracking, or network requests required.
- Completely Ad-free: No ads, no interruptions.
- No Trackers: Zero analytics, zero telemetries, zero third-party SDKs.
- Infinite Levels: Unlimited dynamically generated logic puzzles with guaranteed unique solutions. Daily Challenge is same for everyone.
Screenshots
How to install
- Download the APK from the button at the top of this page.
- Allow “Install unknown apps” for your browser or file manager only, not for every app.
- Open the downloaded file and confirm the installation.
- If installation fails with “App not installed,” remove an earlier build of the same app first. A signature conflict is the usual cause.
Data safety
- Every file is checked against its published SHA-256 before it is listed.
- Files are scanned for malware on every update.
- The permissions each app requests are listed on its own page.
- Read the full safety policy for how we test, flag, and delist files.
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