Referee Whistle
v1.0 · 2.4 MB · code 1
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File information
UpdatedSep 4, 2025
PublishedOct 25, 2018
Packagecom.persim.refereewhistle.refereewhistle
Versionv1.0 (1)
Size2.4 MB
MD51de5f7ebc5b8e4c4184c842e758f710a
Min SDK15
Malware scanTRUSTED
Signature SHA1DB:2B:57:9E:16:F2:29:80:4A:B1:B5:B5:AA:68:B6:EF:B1:50:1A:9A
SignerCN=Referee Whistle, OU=Persim, O=Persim, L=Vl, ST=Czech Republic, C=CZ
Total downloads109
This version109
DeveloperPersim
Age ratingEveryone
What's new in v1.0
Simple and clean
Easy to use
Easy Interface
Easy to use
Easy Interface
Security scan
TRUSTED
- Developer signature verified 2025-09-04
- Scanned for malware 2020-11-03 07:44:50
- Signature SHA1 DB:2B:57:9E:16:F2:29:80:4A:B1:B5:B5:AA:68:B6:EF:B1:50:1A:9A
- File MD5 1de5f7ebc5b8e4c4184c842e758f710a
How to install Referee Whistle v1.0 on Android API 15+
Takes about 2 minutes. You'll need roughly 2.4 MB of free storage.
- Grab com.persim.refereewhistle.refereewhistle_1.apk — hit the Download button above (2.4 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 1de5f7ebc5b8e4c4…. Any difference means the file is corrupted or tampered — delete and re-download.
- Open the APK — tap the download notification, or find com.persim.refereewhistle.refereewhistle_1.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=Referee Whistle, OU=Persim, O=Persim, L=Vl, ST=Czech Republic, C=CZ. 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 Referee Whistle — tap Open on the install screen, or find the Referee Whistle icon in your app drawer.
Common install errors for Referee Whistle
- "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 15 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.