Mental Math

about

description

"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.

publisher

78ce6faa72264387284e647ba6938995735ec8c7d5c5a65737e55130f026307d

first seen

2026-09-25T13:35:15.115965+00:00

last event

2026-10-22 20:19 UTC

website

https://mental-math.codeberg.page/

install

zapstore.dev or any Zapstore-compatible client

topics

#educational game #science & education

source & build

repository

https://codeberg.org/mental-math/mentalmath

arch flags

android-arm64-v8a android-armeabi-v7a android-x86 android-x86_64

manifest

skipped

releases (kind 30063)

2 releases indexed; latest 29.

version	channel	released	event
29	main	2026-10-22 20:19 UTC	a59bc113…
28	main	2026-09-25 13:13 UTC	3131ffd1…

assets & verification

Every app, release and asset event is schnorr-verified (NIP-01 id + signature) before it enters the catalog, and assets are content-addressed by sha256. We subscribe read-only to the catalog relay — never write to it.

29 — Mental Math v29.apk

sha256

59531c5d65b85a86ad73222cceb9d407e760d630686b6db384418da955965c88

size

5.3 MB

archs

android-arm64-v8a, android-armeabi-v7a, android-x86, android-x86_64

version code

29

apk cert sha256

de197b4cf2b85880e0211159b60b6e3c39f96ff06868ae4839c42d8a4d6f3fe5

download

Mental Math v29.apk

28 — Mental Math v28.apk

sha256

33f716618cf8a3f9d070689103a586e8739e1a608e52c7584d20aed53da1f6ae

size

5.3 MB

archs

android-x86, android-x86_64, android-arm64-v8a, android-armeabi-v7a

version code

28

apk cert sha256

de197b4cf2b85880e0211159b60b6e3c39f96ff06868ae4839c42d8a4d6f3fe5

download

Mental Math v28.apk

Showing the newest 2 asset descriptors; the full set is in /api/apps/78ce6faa…