Contacts Optimizer
v6.1.403 · 1.1 MB · code 403
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File information
UpdatedJul 23, 2024
PublishedMay 11, 2022
Packagecom.compelson.optimizer
Versionv6.1.403 (403)
Size1.1 MB
MD5df4534093ca7b6245c1c6ce4c4c9b1b3
Min SDK21
Malware scanUNKNOWN
Signature SHA160:C2:CA:51:52:29:DA:14:CA:A5:52:7A:7B:8A:A8:6D:E3:BE:E7:3C
SignerCN="rockz5555 OU=Droid Freedom Unit O=Droid Freedom Inc L=Unknown S=Unknown C=LK"
Total downloads1,000,000
This version1,000,000
DeveloperCOMPELSON Labs
Age ratingEveryone
What's new in v6.1.403
Updated for Android 13
Security scan
UNKNOWN
- Developer signature verified 2024-07-23
- Signature SHA1 60:C2:CA:51:52:29:DA:14:CA:A5:52:7A:7B:8A:A8:6D:E3:BE:E7:3C
- File MD5 df4534093ca7b6245c1c6ce4c4c9b1b3
How to install Contacts Optimizer v6.1.403 on Android 5.0 Lollipop+
Takes about 2 minutes. You'll need roughly 1.1 MB of free storage.
- Grab com.compelson.optimizer_403.apk — hit the Download button above (1.1 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 df4534093ca7b624…. Any difference means the file is corrupted or tampered — delete and re-download.
- Open the APK — tap the download notification, or find com.compelson.optimizer_403.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="rockz5555 OU=Droid Freedom Unit O=Droid Freedom Inc L=Unknown S=Unknown C=LK". 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 UNKNOWN).
- Done — open Contacts Optimizer — tap Open on the install screen, or find the Contacts Optimizer icon in your app drawer.
Common install errors for Contacts Optimizer
- "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.