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Quick answer
Mental arithmetic and vocabulary game, no ads, no trackers
Numbers & Letters is a mental arithmetic and vocabulary game, in the spirit of the well-known French TV game show of the same principle, with no affiliation to it.
Two game modes:
* Numbers: 6 numbers are drawn along with a target to reach. Build your calculation step by step, calculator-style, combining the numbers with the 4 basic operations. * Letters: 10 letters are drawn. Find the longest possible word using these letters before time runs out.
Several ways to play:
* Solo game, with 4 levels of increasing difficulty (Emile, Nestor, Monique, Mathieu), alternating numbers and letters rounds. * Duo game, for two players on the same phone, with a Duo mode (each keeps their own score) or a Head-to-head mode (only one winner per round). * Network game, the same duo game but on two separate phones, connected over Wi-Fi or Bluetooth. * Daily challenge, with a randomly drawn goal each day and trophies for streaks of successful days. * Streak, timed, words and no-mistake challenges, to progress at your own pace. * Free training mode, with no time limit and no round limit.
The app keeps track of your statistics and rewards your progress with trophies, offers a light or dark theme, and works entirely offline: no ads, no trackers, no network connection required (except to play a network game).
Free and open source software under the GNU GPL-3.0 license.
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.
Frequently asked questions
What is Numbers & Letters?
Mental arithmetic and vocabulary game, no ads, no trackers
Who develops Numbers & Letters?
Numbers & Letters is developed by Pierre.
Which Android version does Numbers & Letters require?
Numbers & Letters requires Android API 33 or later.
What is the current version of Numbers & Letters?
The synchronized F-Droid version is 1.94.
Which license does Numbers & Letters use?
The signed F-Droid metadata lists GPL-3.0-only.
Where is the source code for Numbers & Letters?
https://github.com/Pierre-21-git/chiffreslettres
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