Headphone Calculator
v3.92 · 3.7 MB · code 27
Verify you're human
Solve this to start the download.
File information
UpdatedNov 27, 2025
PublishedApr 20, 2021
Packageappinventor.ai_robinette77.HeadphoneCalculator
Versionv3.92 (27)
Size3.7 MB
MD5e9dbc922d76738018fcb6cd76ad2abd9
Min SDK7
Malware scanTRUSTED
Signature SHA12E:72:44:0B:59:61:DB:16:46:D1:93:D4:0A:AC:2C:2C:49:A9:54:01
Signer[email protected], O=AppInventor for Android, C=US
Total downloads5,000
This version5,000
DeveloperRob Robinette
Age ratingEveryone
What's new in v3.92
Android version update
Security scan
TRUSTED
- Developer signature verified 2025-11-27
- Signature SHA1 2E:72:44:0B:59:61:DB:16:46:D1:93:D4:0A:AC:2C:2C:49:A9:54:01
- File MD5 e9dbc922d76738018fcb6cd76ad2abd9
How to install Headphone Calculator v3.92 on Android API 7+
Takes about 2 minutes. You'll need roughly 3.7 MB of free storage.
- Grab appinventor.ai_robinette77.HeadphoneCalculator_27.apk — hit the Download button above (3.7 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 e9dbc922d7673801…. Any difference means the file is corrupted or tampered — delete and re-download.
- Open the APK — tap the download notification, or find appinventor.ai_robinette77.HeadphoneCalculator_27.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 [email protected], O=AppInventor for Android, C=US. 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 Headphone Calculator — tap Open on the install screen, or find the Headphone Calculator icon in your app drawer.
Common install errors for Headphone 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 7 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.