Sigma Lock
v1.7 · 10 MB · code 8
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File information
UpdatedFeb 7, 2018
PublishedFeb 7, 2018
Packagecom.croem.sigma.OTP
Versionv1.7 (8)
Size10 MB
MD50dbc3442f809f0f210be799515ac9f97
Min SDK9
Malware scanTRUSTED
Signature SHA161:9B:25:A9:72:E3:56:55:DE:51:36:8B:D9:45:19:C4:5E:D2:1F:87
SignerCN=sigmalock
Total downloads100
This version100
DeveloperSigma Processing Group
Age ratingEveryone
What's new in v1.7
- Performance improved
- Bug fixes
- Bug fixes
Security scan
TRUSTED
- Developer signature verified 2020-05-21
- Scanned for malware 2020-10-31 05:54:01
- Signature SHA1 61:9B:25:A9:72:E3:56:55:DE:51:36:8B:D9:45:19:C4:5E:D2:1F:87
- File MD5 0dbc3442f809f0f210be799515ac9f97
How to install Sigma Lock v1.7 on Android API 9+
Takes about 2 minutes. You'll need roughly 10 MB of free storage.
- Grab com.croem.sigma.OTP_8.apk — hit the Download button above (10 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 0dbc3442f809f0f2…. Any difference means the file is corrupted or tampered — delete and re-download.
- Open the APK — tap the download notification, or find com.croem.sigma.OTP_8.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=sigmalock. 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 Sigma Lock — tap Open on the install screen, or find the Sigma Lock icon in your app drawer.
Common install errors for Sigma Lock
- "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 API 9 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.