Rule of Three Calculator
v2.0.11 · 14.7 MB · code 111
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File information
UpdatedApr 3, 2026
PublishedMar 27, 2026
Packagecom.aplicaciones.gastry.regladetres
Versionv2.0.11 (111)
Size14.7 MB
MD557c2544c107b1ad1e92c0a5dd45231fc
Min SDK24
ABIsx86, x86-64, armeabi-v7a, arm64-v8a
Malware scanTRUSTED
Signature SHA1EA:FC:E5:39:27:6C:CF:C5:2E:E9:93:16:70:2C:00:75:A5:FA:98:96
SignerCN=Juan Mauricio Piano Monz?, L=Sollana, ST=Valencia, C=ES
Total downloads50,000
This version50,000
DeveloperGastry
Age ratingEveryone
What's new in v2.0.11
Improved the ad-free purchase experience.
The price is now shown more clearly in the app.
Also improved the fallback shown when ads are unavailable and refined the purchase highlight in Settings.
The price is now shown more clearly in the app.
Also improved the fallback shown when ads are unavailable and refined the purchase highlight in Settings.
Security scan
TRUSTED
- Developer signature verified 2026-04-03
- Signature SHA1 EA:FC:E5:39:27:6C:CF:C5:2E:E9:93:16:70:2C:00:75:A5:FA:98:96
- File MD5 57c2544c107b1ad1e92c0a5dd45231fc
How to install Rule of Three Calculator v2.0.11 on Android 7.0 Nougat+
Takes about 2 minutes. You'll need roughly 14.7 MB of free storage.
- Grab com.aplicaciones.gastry.regladetres_111.apk — hit the Download button above (14.7 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 57c2544c107b1ad1…. Any difference means the file is corrupted or tampered — delete and re-download.
- Open the APK — tap the download notification, or find com.aplicaciones.gastry.regladetres_111.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=Juan Mauricio Piano Monz?, L=Sollana, ST=Valencia, C=ES. 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 Rule of Three Calculator — tap Open on the install screen, or find the Rule of Three Calculator icon in your app drawer (this build targets x86/x86-64/armeabi-v7a/arm64-v8a devices).
Common install errors for Rule of Three Calculator
- "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 7.0 Nougat 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.
- Works on one phone but not another — this build ships x86/x86-64/armeabi-v7a/arm64-v8a native code. Devices with a different CPU will reject it.