Radioactivity Counter
v2.1 · 2.4 MB · code 12
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File information
UpdatedMay 24, 2019
PublishedMay 24, 2019
Packagecom.rdklein.radioactivity
Versionv2.1 (12)
Size2.4 MB
MD5be418565a8e1dbecd76933411645978e
Min SDK15
Malware scanUNKNOWN
Signature SHA1C4:15:CF:F4:6E:35:CD:30:21:1F:63:89:1C:8C:0D:45:28:61:BC:64
SignerCN=Rolf-Dieter Klein, OU=Dipl.-Ing. Rolf-Dieter Klein, O=Dipl.-Ing. Rolf-Dieter Klein, L=Munich, ST=Germany, C=de
Total downloads10,000
This version10,000
DeveloperRolf-Dieter Klein
Age ratingEveryone
Security scan
UNKNOWN
- Developer signature verified 2021-11-11
- Scanned for malware 2020-10-20 06:59:26
- Signature SHA1 C4:15:CF:F4:6E:35:CD:30:21:1F:63:89:1C:8C:0D:45:28:61:BC:64
- File MD5 be418565a8e1dbecd76933411645978e
How to install Radioactivity Counter v2.1 on Android API 15+
Takes about 2 minutes. You'll need roughly 2.4 MB of free storage.
- Grab com.rdklein.radioactivity_12.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 be418565a8e1dbec…. Any difference means the file is corrupted or tampered — delete and re-download.
- Open the APK — tap the download notification, or find com.rdklein.radioactivity_12.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=Rolf-Dieter Klein, OU=Dipl.-Ing. Rolf-Dieter Klein, O=Dipl.-Ing. Rolf-Dieter Klein, L=Munich, ST=Germany, 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 UNKNOWN).
- Done — open Radioactivity Counter — tap Open on the install screen, or find the Radioactivity Counter icon in your app drawer.
Common install errors for Radioactivity Counter
- "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.