Certain Check-In
v6.2 · 8.6 MB · code 51
Verify you're human
Solve this to start the download.
File information
UpdatedJun 13, 2024
PublishedApr 17, 2021
Packagecom.app.cci
Versionv6.2 (51)
Size8.6 MB
MD563db4fce4cd15417c17315ced94ed104
Min SDK21
Malware scanTRUSTED
Signature SHA1D4:A5:05:12:32:EC:32:11:11:55:D7:9F:BE:5D:38:29:4B:5B:F4:B3
SignerCN=Certain Inc., OU=Certain Check-In, O=Certain Inc., L=San Francisco, ST=California, C=US
Total downloads5,000
This version5,000
DeveloperCertain Inc.
Age ratingEveryone
What's new in v6.2
Bug Fixes
App has been tested with latest Android 12 release.
App has been tested with latest Android 12 release.
Security scan
TRUSTED
- Developer signature verified 2024-06-13
- Signature SHA1 D4:A5:05:12:32:EC:32:11:11:55:D7:9F:BE:5D:38:29:4B:5B:F4:B3
- File MD5 63db4fce4cd15417c17315ced94ed104
How to install Certain Check-In v6.2 on Android 5.0 Lollipop+
Takes about 2 minutes. You'll need roughly 8.6 MB of free storage.
- Grab com.app.cci_51.apk — hit the Download button above (8.6 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 63db4fce4cd15417…. Any difference means the file is corrupted or tampered — delete and re-download.
- Open the APK — tap the download notification, or find com.app.cci_51.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=Certain Inc., OU=Certain Check-In, O=Certain Inc., L=San Francisco, 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 Certain Check-In — tap Open on the install screen, or find the Certain Check-In icon in your app drawer.
Common install errors for Certain Check-In
- "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.