QTc calculator
v1.0 · 2.2 MB · code 1
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File information
UpdatedMay 20, 2024
PublishedOct 20, 2020
Packagebr.qtc
Versionv1.0 (1)
Size2.2 MB
MD553e5c93179347d27f2e61ae1a7b68c48
Min SDK14
Malware scanTRUSTED
Signature SHA1BC:67:42:E4:68:A1:64:83:63:0A:5C:1F:8D:71:35:AB:9E:23:32:50
SignerCN=Blue Rock, L=yokohama, ST=kanagawa, C=jp
Total downloads1,000
This version1,000
DeveloperBlue Rock
Age ratingEveryone
Security scan
TRUSTED
- Developer signature verified 2024-05-20
- Scanned for malware 2024-05-20 10:21:34
- Signature SHA1 BC:67:42:E4:68:A1:64:83:63:0A:5C:1F:8D:71:35:AB:9E:23:32:50
- File MD5 53e5c93179347d27f2e61ae1a7b68c48
How to install QTc calculator v1.0 on Android API 14+
Takes about 2 minutes. You'll need roughly 2.2 MB of free storage.
- Grab br.qtc_1.apk — hit the Download button above (2.2 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 53e5c93179347d27…. Any difference means the file is corrupted or tampered — delete and re-download.
- Open the APK — tap the download notification, or find br.qtc_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=Blue Rock, L=yokohama, ST=kanagawa, C=jp. 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 QTc calculator — tap Open on the install screen, or find the QTc calculator icon in your app drawer.
Common install errors for QTc 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 API 14 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.