Viola *Plugin*
Viola sound plugin for Functional Ear Trainer
Kaizen9 Apps · com.kaizen9.fet.sounds.viola
- Signature matches the Google Play version Details
At a glance
- Latest version
- v2.0.2 (2000002)
- Updated
- Jan 8, 2026 (9 months ago)
- APK size
- 7.4 MB
- Requires
- Android 4.1+ (API 16)
- CPU support
- Any (no native code)
- Category
- Music & Audio (app)
- Permissions
- 1
- Developer contact
- [email protected]
About this APK
Viola *Plugin* is an app by Kaizen9 Apps in the Music & Audio category. It has no native code, so it runs on any Android processor.
Since version 2.0.0, the minimum Android version rose from 4.0 to 4.1. It asks for 1 permission, none of them sensitive. It asks for the same permissions as version 2.0.1.
What's new in v2.0.2
Description
From the listing uploaded by “appupdater”.
Version history
3 versions are listed, going back to v2.0.0. Since v2.0.1 it requires Android 4.1+.
Security & authenticity
Signing certificate
- Signature matches the Google Play version Checked by the source store on Jan 8, 2026.
- Certificate issued to “Kaizen9 Apps” This is the certificate of the Google Play version.
- Same certificate as the 2 other versions checked
Store checks and file details
- Developer signature verified Jan 8, 2026
- Validated against Google Play Jan 8, 2026
- Signed byCN=S Korchan, OU=Mobile Development, O=Kaizen9 Apps, L=Unknown, ST=Unknown, C=UA
- Signing certificate (SHA-1)59:92:67:DF:A9:B4:E8:09:9E:D7:A0:B5:96:32:B6:FE:B7:89:4F:DC
- File MD584af6d5ac7488bfdf6eeaa272af79366
- Uploaded by “appupdater” Gold tier · 117,810 followers · uploading since 2020
Scans and ratings come from the source store; the certificate comparisons are AAPKs's own, made from the files' published signatures (2 other versions compared). AAPKs doesn't scan files itself — compare the MD5 and signer after downloading.
Permissions (1)
Viola *Plugin* requests 1 permission, none of them sensitive.
- Internal broadcast protection (app-defined) com.kaizen9.fet.sounds.viola.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION
Required hardware & features
- Basic touch input android.hardware.faketouch
Viola *Plugin* APK: questions and answers
Is there a version of Viola *Plugin* for older Android phones?
The current version needs Android 4.1 or later. Version 2.0.0 is the newest listed build that installs on Android 4.0 and later. It is an old build: apps that rely on online services may no longer connect when they are this old. Get version 2.0.0 · All versions
Can I install this APK over the version I already have?
Yes, if your installed copy is older. It is signed like the Google Play version, so Android installs it as an update and keeps your data.
Is the Viola *Plugin* APK safe?
No one can promise that a file is safe, but some things can be checked. The source store rates this file Trusted. Its signature matches the Google Play version. It is signed with the same certificate as the 2 other versions checked. After downloading, check that the file's MD5 is 84af6d5ac7488bfdf6eeaa272af79366.
