Mental Math

com.helddertierwelt.mentalmath
by Zapstore _@zapstore.dev

Practice mental arithmetic solo or compete with friends.

Republished from GitHub / F-Droid by the Zapstore main account.

"Mental Math" is a simple and clean Android app for mental arithmetic training. You can practice on your own or challenge friends to compete and improve your skills. The app is open source and respects your privacy. Customizable Training Select which arithmetic operations to include (+, −, ×, ÷). For each operation, choose from nine difficulty levels to customize your training precisely to your skill level. Two Game Modes • Practice Mode lets you complete a fixed number of problems (10, 20, 30, 40, or 50). • Timed Mode challenges you to solve as many problems as possible within a time limit (1, 2, 3, 4, or 5 minutes). Challenge your Friends You can share a game link to: 1. Replay a completed game with the exact same problems to compare scores with friends. 2. Start a new game with preset settings for a fair and fresh challenge for everyone. Difficulty Calculation Problem difficulty is determined using algorithms based on column addition, column subtraction, long multiplication, and long division, creating realistic and well-balanced exercises. Detailed Results After each game, view a detailed summary that includes your selected settings, your performance (accuracy, speed, and score), and a complete list of all your problems and answers for review. Personal Leaderboard Your top 10 results are displayed separately for each combination of settings, allowing you to easily track your progress. You can also review detailed summaries of your top games at any time. Game History Explore the complete history of all your scored games. You can sort the list by time or numerically to find specific games. Anytime, you can revisit any match to view a detailed summary of its results. Practice Reminders Set up periodic reminders to support regular mental math practice. Notifications are sent in the evening (around 6 p.m.) and can be scheduled daily, every three days, or weekly. Customizable Interface Choose your preferred keypad (numeric or phone-style), display math problems horizontally or vertically, and adjust the input direction (left-to-right or right-to-left) to suit your preferences. Sound & Vibration Choose sound and/or vibration as feedback during games for clearer, more immediate feedback. Both options can be enabled or disabled independently. Vibration may depend on your device or system settings. Clean Design A simple and minimalist app design with no unnecessary elements or distractions, designed to keep your focus fully on mental math training. Supports both light and dark modes. Open Source, Private, Free & Ad-free "Mental Math" is fully open source, free to use, and does not contain any ads. It also does not collect, store, or process any personal data, nor does it use trackers or third-party services.

First release: Jan 3, 2026, 11 total releases.

Most recent release: Oct 22, 2026.

Website Repo

Appears in 1 app stack.

100 sats / 1 zaps received in the past year.

Sats Received

Underlying data available via MCP: app_zaps, app_releases.

Zap Count

Underlying data available via MCP: app_zaps, app_releases.

Releases

  • Oct 22, 2026 29
    Mental Math v29 - Introduced the new Survival Mode with up to 100 problems - Migrated the game database to a new data structure, significantly reducing storage usage - Added Turkish translation contributed by Barış Selayet. Thank you! :) - Added Brazil translation contributed by Bruno de Paula. Thank you! :) - Improved input handling to prevent accidental double presses - Scores are now calculated to tenths of a second to match the timer’s 100 ms update interval - Added a red pulsating countdown for the final 10 seconds in Timed Mode - Fixed a crash in Timed Mode when no problems were solved
    More…
    - Help improve translations on https://hosted.weblate.org/projects/mental-math/
  • Sep 25, 2026 28
    Mental Math v28 - Added sound as a feedback option. - Added vibration as a feedback option. - Reorganized the menu with expandable categories for a more structured layout. - Added Arabic translation contributed by Eisa Ali and E Ta. Thank you! :) - Previous game settings are now preserved after Random Game or Link Game. - Fixed a bug when disabling the slider while dragging.
  • Aug 15, 2026 27
    Mental Math v27 - Reorganized strings.xml files to enable translations via Weblate (https://hosted.weblate.org/projects/mental-math/) - Added Bengali translation contributed by Mahir Daiyan. Thank you! :) - Added Hungarian translation reviewed by Dóry. Thank you! :) - Added Serbian translation reviewed by Svetislav. Thank you! :) - Added Croatian translation reviewed by Ana. Thank you! :) - Redesigned the problem overview again to reduce confusion. - Improved the problem overview for problems that span multiple lines. - Added tooltips for the status icons in the problem overview.
  • Jul 16, 2026 26
    Mental Math v26 - Added Russian translation contributed by Alexej Melcher. Thank you! :) - Redesigned the problem overview to reduce confusion. - Added an option to display math problems vertically instead of horizontally. - The layout can also be changed during gameplay by tapping the math problem. - Added a menu option to open the app language settings. - Added rank display next to score in the overview for Top 10 results. - Made the score based on milliseconds instead of seconds. - Scores are now displayed as whole numbers instead of decimals.
    More…
    - Added fade effects at the top and bottom of the scrollable menu to indicate when content is scrollable.
  • Jun 15, 2026 25
    Mental Math v25 - Added Italian translation contributed by zini.simons. Thank you! :) - Added Greek translation contributed by Nick Batzakis. Thank you! :) - Added German translation. - fixed bug for devices with older version of SQLite - Enable per-app language selection via Android system settings (requires Android 13 or higher) - Prepared for sound effects for correct and incorrect answers in the future. - updated dependencies
  • May 3, 2026 24
    - Added French translation contributed by @mdk. Thank you! :) - Enable per-app language selection via Android system settings (requires Android 13 or higher) - Removed “Total Score” and renamed “Active Score” to simply “Score” to reduce confusion - Added tooltips to the game overview for improved clarity - Reworked the speed statistic: now displayed as time per correct answer instead of correct answers per minute - Fixed a crash when using the “About” or “Feedback” options on systems without a default browser or mail client - Added a message to the problem overview when no problems have been solved. - Renamed “task” to “problem” across the codebase for consistency - updated dependencies
  • Apr 9, 2026 23
    Mental Math v23 - Input field is now clickable to switch input direction while in game - Also added a popup notification when switching input direction in game - Improved a few colors - Dependency updates
  • Mar 14, 2026 22
    Mental Math v22 - Prepared the app to support translations in the future. Please consider contributing! See the "Contributing" section on the website (via the About button in the app). - Added RTL (Right-to-Left) layout support for languages like Arabic and Hebrew. The UI is still English-only, so minor text formatting issues may occur until translations are added. - Removed some unnecessary permissions.
  • Feb 25, 2026 21
    Mental Math v21 - Fixed a crash that occurred after completing a game launched via an app link. - RTL (right-to-left) support has been temporarily disabled to improve layout stability. - Standardized number formatting to Western Arabic numerals.
  • Feb 15, 2026 20
    Mental Math v20 - Reminder feature: Periodic reminders for mental math practice (daily, every three days, or weekly). - Notifications are sent in the evening (around 6 p.m.), unless suppressed by battery optimization settings. - Added new icon for skipped exercises in the task overview to make it clearer. - Removed the “Source Code” menu item (link is available on the About website).
  • Jan 3, 2026 19 Release page →
    Mental Math v19 - improved behavior of the task overview in cases where the task and input are too long for the line - dependency updates - minor code improvements