Buffl: Learn with flashcards
v2.1.1 · 39.3 MB · code 49
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File information
UpdatedMar 19, 2026
PublishedOct 20, 2020
Packagecom.brainfactory.buffl
Versionv2.1.1 (49)
Size39.3 MB
MD5ff5efa36dab44138d578ebde92203359
Min SDK21
ABIsx86-64, armeabi-v7a, arm64-v8a
Malware scanTRUSTED
Signature SHA149:A4:0E:06:09:58:A1:5D:80:51:7E:14:43:91:2E:C8:CC:48:AC:2F
SignerCN=Android, OU=Android, O=Google Inc., L=Mountain View, ST=California, C=US
Total downloads50,000
This version50,000
DeveloperBrain Factory GmbH
Age ratingEveryone
What's new in v2.1.1
Added support for latex in multiple choice questions
Security scan
TRUSTED
- Developer signature verified 2026-03-19
- Signature SHA1 49:A4:0E:06:09:58:A1:5D:80:51:7E:14:43:91:2E:C8:CC:48:AC:2F
- File MD5 ff5efa36dab44138d578ebde92203359
How to install Buffl: Learn with flashcards v2.1.1 on Android 5.0 Lollipop+
Takes about 2 minutes. You'll need roughly 39.3 MB of free storage.
- Grab com.brainfactory.buffl_49.apk — hit the Download button above (39.3 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 ff5efa36dab44138…. Any difference means the file is corrupted or tampered — delete and re-download.
- Open the APK — tap the download notification, or find com.brainfactory.buffl_49.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=Android, OU=Android, O=Google Inc., L=Mountain View, ST=California, C=US. 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 Buffl: Learn with flashcards — tap Open on the install screen, or find the Buffl: Learn with flashcards icon in your app drawer (this build targets x86-64/armeabi-v7a/arm64-v8a devices).
Common install errors for Buffl: Learn with flashcards
- "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 5.0 Lollipop 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 x86-64/armeabi-v7a/arm64-v8a native code. Devices with a different CPU will reject it.