Study91
v2.83 · 41.1 MB · code 126
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File information
UpdatedJun 9, 2024
PublishedJun 4, 2021
Packagecom.study.nintyone
Versionv2.83 (126)
Size41.1 MB
MD5f1e92112b2d6288ecdf4534280679814
Min SDK21
ABIsx86, x86-64, armeabi, armeabi-v7a, arm64-v8a, mips
Malware scanTRUSTED
Signature SHA1B6:EF:46:16:57:33:00:65:3E:5A:E8:23:BA:90:86:C8:7B:B9:90:AF
SignerCN=Android, OU=Android, O=Google Inc., L=Mountain View, ST=California, C=US
Total downloads500,000
This version500,000
DeveloperStudy91
Age ratingEveryone
Security scan
TRUSTED
- Developer signature verified 2024-06-09
- Signature SHA1 B6:EF:46:16:57:33:00:65:3E:5A:E8:23:BA:90:86:C8:7B:B9:90:AF
- File MD5 f1e92112b2d6288ecdf4534280679814
How to install Study91 v2.83 on Android 5.0 Lollipop+
Takes about 2 minutes. You'll need roughly 41.1 MB of free storage.
- Grab com.study.nintyone_126.apk — hit the Download button above (41.1 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 f1e92112b2d6288e…. Any difference means the file is corrupted or tampered — delete and re-download.
- Open the APK — tap the download notification, or find com.study.nintyone_126.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 Study91 — tap Open on the install screen, or find the Study91 icon in your app drawer (this build targets x86/x86-64/armeabi/armeabi-v7a/arm64-v8a/mips devices).
Common install errors for Study91
- "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/x86-64/armeabi/armeabi-v7a/arm64-v8a/mips native code. Devices with a different CPU will reject it.