0-20 Pullups Back Trainer
v6.7.7 · 89.6 MB · code 280
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File information
UpdatedAug 27, 2025
PublishedNov 3, 2021
Packagecom.zenlabs.challenge.pullups
Versionv6.7.7 (280)
Size89.6 MB
MD5b871a9b8ec480db5d529d419f4c382d9
Min SDK23
ABIsx86, x86-64, armeabi-v7a, arm64-v8a
Malware scanTRUSTED
Signature SHA1EA:23:08:DB:6B:AC:59:CD:83:22:7B:16:95:49:45:77:09:A1:B9:62
SignerCN=Pullups Challenge
Total downloads100,000
This version100,000
DeveloperZen Labs Fitness
Age ratingEveryone
What's new in v6.7.7
- small optimizations and upgrades
Security scan
TRUSTED
- Developer signature verified 2025-08-27
- Signature SHA1 EA:23:08:DB:6B:AC:59:CD:83:22:7B:16:95:49:45:77:09:A1:B9:62
- File MD5 b871a9b8ec480db5d529d419f4c382d9
How to install 0-20 Pullups Back Trainer v6.7.7 on Android 6.0 Marshmallow+
Takes about 2 minutes. You'll need roughly 89.6 MB of free storage.
- Grab com.zenlabs.challenge.pullups_280.apk — hit the Download button above (89.6 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 b871a9b8ec480db5…. Any difference means the file is corrupted or tampered — delete and re-download.
- Open the APK — tap the download notification, or find com.zenlabs.challenge.pullups_280.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=Pullups Challenge. 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 0-20 Pullups Back Trainer — tap Open on the install screen, or find the 0-20 Pullups Back Trainer icon in your app drawer (this build targets x86/x86-64/armeabi-v7a/arm64-v8a devices).
Common install errors for 0-20 Pullups Back Trainer
- "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.
- Works on one phone but not another — this build ships x86/x86-64/armeabi-v7a/arm64-v8a native code. Devices with a different CPU will reject it.