CalfApp GO!
v4.1.147 · 67.1 MB · code 4001147
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File information
UpdatedOct 31, 2025
PublishedJul 29, 2021
Packagede.foerster.calfappgo
Versionv4.1.147 (4001147)
Size67.1 MB
MD5c36a1c0772bd56b0bd9534ab1d6b0591
Min SDK29
Malware scanTRUSTED
Signature SHA1A3:82:89:B0:CC:0B:65:B6:9C:26:6A:EE:97:BB:8F:A2:85:81:7B:C6
SignerO=F?rster Technik GmbH, ST=Engen, C=DE
Total downloads5,000
This version5,000
DeveloperFörster-Technik GmbH
Age ratingEveryone
What's new in v4.1.147
Bug fixes and improvements
Security scan
TRUSTED
- Developer signature verified 2025-10-31
- Signature SHA1 A3:82:89:B0:CC:0B:65:B6:9C:26:6A:EE:97:BB:8F:A2:85:81:7B:C6
- File MD5 c36a1c0772bd56b0bd9534ab1d6b0591
How to install CalfApp GO! v4.1.147 on Android 10+
Takes about 2 minutes. You'll need roughly 67.1 MB of free storage.
- Grab de.foerster.calfappgo_4001147.apk — hit the Download button above (67.1 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 c36a1c0772bd56b0…. Any difference means the file is corrupted or tampered — delete and re-download.
- Open the APK — tap the download notification, or find de.foerster.calfappgo_4001147.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 O=F?rster Technik GmbH, ST=Engen, C=DE. 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 CalfApp GO! — tap Open on the install screen, or find the CalfApp GO! icon in your app drawer.
Common install errors for CalfApp GO!
- "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 10 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.