Math Flash Cards
v4.1 · 4.6 MB · code 36
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File information
UpdatedApr 14, 2026
PublishedJan 21, 2021
Packagecom.november31.mathflashcards
Versionv4.1 (36)
Size4.6 MB
MD5a3f3ecc5005f7a4d6b9290bd57e95407
Min SDK23
Malware scanTRUSTED
Signature SHA178:47:50:E9:DB:05:77:72:E4:19:A9:B2:D8:CC:F6:CC:DF:7C:FE:43
SignerCN=Julio Rodriguez
Total downloads500,000
This version500,000
DeveloperNovember31
Age ratingEveryone
What's new in v4.1
Hide Nav bar, override custom fonts, updated Android API, minor fixes
Security scan
TRUSTED
- Developer signature verified 2026-04-14
- Signature SHA1 78:47:50:E9:DB:05:77:72:E4:19:A9:B2:D8:CC:F6:CC:DF:7C:FE:43
- File MD5 a3f3ecc5005f7a4d6b9290bd57e95407
How to install Math Flash Cards v4.1 on Android 6.0 Marshmallow+
Takes about 2 minutes. You'll need roughly 4.6 MB of free storage.
- Grab com.november31.mathflashcards_36.apk — hit the Download button above (4.6 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 a3f3ecc5005f7a4d…. Any difference means the file is corrupted or tampered — delete and re-download.
- Open the APK — tap the download notification, or find com.november31.mathflashcards_36.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=Julio Rodriguez. 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 Flash Cards — tap Open on the install screen, or find the Math Flash Cards icon in your app drawer.
Common install errors for Math Flash Cards
- "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 6.0 Marshmallow 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.