maintained
Mental Math
com.helddertierwelt.mentalmathPractice mental arithmetic solo or compete with friends.
Latest documented release2719 Aug 2026 · 12.4 MB→01 / Overview
Is Mental Math safe?
"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 s…
- Developer
- HeldDerTierwelt
- Category
- Educational Game
- First release
- 19 Aug 2026
- License
- Not documented
02 / Package identity
Technical fingerprint
Application ID
com.helddertierwelt.mentalmathLatest APK SHA-256
68af653d1dc0b1841374100462163c12a36fe5c9afe4b187bd1a0400fe546dc7Signing certificate
DE:19:7B:4C:F2:B8:58:80:E0:21:11:59:B6:0B:6E:3C:39:F9:6F:F0:68:68:AE:48:39:C4:2D:8A:4D:6F:3F:E5MIN ANDROID24TARGET36ARCHITECTUREarm64-v8a · armeabi-v7a · x86 · x86_64
03 / History
Project timeline
Package observed in source index
Metadata and versions observed from the fdroid repository index.
04 / Version archive
Documented releases
1 TOTALVersionReleasedAndroidArchitecture
2724+arm64-v8a, armeabi-v7a, x86, x86_64→05 / Safety & access
Safety verdict
Authentic — file hash matches the source indexNo ads or tracking flagged by the source
IntegritySHA-256 verified vs source
SourceOpen-source · fdroid
Permissions4 declared · 0 sensitive
Signaturepresent
Anti-featuresNo known anti-features
Sensitive accessNo sensitive permissions
Declared permissions
Tracker status: Not assessed by WIKI for Android.
06 / Sources
Evidence ledger
Each entry is a captured public reference backing this record.