Math on chalkboard
v2.1.2 · 11.8 MB · code 2001002
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File information
UpdatedSep 24, 2025
PublishedFeb 18, 2021
Packageair.mathonboard
Versionv2.1.2 (2001002)
Size11.8 MB
MD5fc2304f2a7115751a4e76692d524f7cc
Min SDK14
ABIsarmeabi-v7a
Malware scanTRUSTED
Signature SHA1A0:C0:70:6B:88:DB:DF:38:95:5F:1B:D3:1E:E6:EE:D6:9F:69:C6:1C
SignerCN=Hovhannes Nshanyan, OU=s/w, O=Maths-and-Games, C=AM
Total downloads100,000
This version100,000
DeveloperMath and Games Studio
Age ratingEveryone
What's new in v2.1.2
Updated the language and buttons panels
Security scan
TRUSTED
- Developer signature verified 2021-10-23
- Scanned for malware 2021-10-23 14:13:53
- Signature SHA1 A0:C0:70:6B:88:DB:DF:38:95:5F:1B:D3:1E:E6:EE:D6:9F:69:C6:1C
- File MD5 fc2304f2a7115751a4e76692d524f7cc
How to install Math on chalkboard v2.1.2 on Android API 14+
Takes about 2 minutes. You'll need roughly 11.8 MB of free storage.
- Grab air.mathonboard_2001002.apk — hit the Download button above (11.8 MB). If your browser warns about APK files, choose Keep or Download anyway — that warning fires on every APK, not just this one.
- Trust your browser to install — on Android 8+ go to Settings → Apps → Special access → Install unknown apps, pick the app you downloaded with (Chrome, Firefox, Files, etc.), and flip Allow from this source. On older Android, toggle Unknown sources under Security.
- (Optional) Verify the file — compute the MD5 of the downloaded APK and make sure it matches fc2304f2a7115751…. Any difference means the file is corrupted or tampered — delete and re-download.
- Open the APK — tap the download notification, or find air.mathonboard_2001002.apk in your Files app under Downloads, then tap it. Android's package installer will appear.
- Check the signer — the install screen will name the publisher. For this build it should read CN=Hovhannes Nshanyan, OU=s/w, O=Maths-and-Games, C=AM. If it doesn't match, cancel — you have the wrong file.
- Review permissions & tap Install — scroll the permission list, then confirm. If Play Protect flags it, tap Install anyway (this APK was scanned as TRUSTED).
- Done — open Math on chalkboard — tap Open on the install screen, or find the Math on chalkboard icon in your app drawer (this build targets armeabi-v7a devices).
Common install errors for Math on chalkboard
- "App not installed" — usually means an older or differently-signed version is already on your device. Uninstall it first, then retry. Your data may be lost unless you back it up.
- "Parse error" — the APK is for a newer Android than yours. This version needs Android API 14 or later. Pick an older build from the versions list below.
- "There was a problem parsing the package" — the download was interrupted. Delete the file and re-download over Wi-Fi.
- Works on one phone but not another — this build ships armeabi-v7a native code. Devices with a different CPU will reject it.