Perfect Ear - Music Theory, Ear & Rhythm Training v3.1.1a
APK · 4.7 MB · version code 138 · Android 4.0.3+ · uploaded May 22, 2016
- Signature matches the Google Play version Details
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Compared with the latest version
The latest version is v3.8.40, uploaded Jul 4, 2026 — about 10 years after this one.
- Size: this file is 4.7 MB; the latest is 5.6 MB (937.4 KB larger).
- Android: this version needs Android 4.0.3+; the latest needs Android 4.4+. Use this one if your device runs an older Android release.
- The latest version asks for 2 more permissions: Control vibration, Modify shared storage.
File information
- Version
- v3.1.1a (138)
- Uploaded
- May 22, 2016
- Size
- 4.7 MB
- Requires
- Android 4.0.3+ (API 15)
- CPU support
- ARM (legacy), ARM 32-bit
- Screen
- Normal screens and larger
- MD5
- ab3715054a0d9274f37be76d20a0dfb8
- Signing certificate (SHA-1)
- C9:61:C9:F2:14:AA:0D:B4:69:D9:D2:C0:ED:B6:FF:E4:89:68:1B:E8
- Signed by
- CN=Alexander Osmanov, OU=Home, O=Home, L=Voronezh, ST=Voronezh Region, C=RU
- File name
- com-evilduck-musiciankit-138-19031113-ab3715054a0d9274f37be76d20a0dfb8.apk
- Package
- com.evilduck.musiciankit
- Downloads (all versions)
- 5M+
- Age rating
- PEGI 3 · Everyone
What's new in v3.1.1a
What's new in 3.1.1:
- Fixed Melodic Dictation showing answer to next question in Quick Mode
- Added a setting to enable all keys in Chord Progressions
- Melodic Dictation exercise now uses all keys
What's new in 3.1.0:
- Added new theoretical introduction into each section
- Theory articles
- Interactive Intervals, Chords and Scales dictionaries.
- Added metronome latency calibration section
- Fixed mistakes and typos in theory articles reported by users
Permissions (4)
This version requests 4 permissions, 1 of them sensitive.
- Record audio (microphone) Sensitive android.permission.RECORD_AUDIO
- Full network access android.permission.INTERNET
- In-app purchases (Google Play Billing) com.android.vending.BILLING
- View network connections android.permission.ACCESS_NETWORK_STATE
Security & authenticity
Security rating: Trusted
Signing certificate
- Signature matches the Google Play version Checked by the source store on May 23, 2016.
- Certificate issued to “Home” This is the certificate of the Google Play version.
- Same certificate as the 2 other versions checked
Store checks
- Developer signature under review Mar 9, 2025
- Validated against Google Play May 23, 2016
- Antivirus scan passed Apr 6, 2020
- Uploaded by “arelange” 166 followers · uploading since 2014
Scans 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.
How to install Perfect Ear - Music Theory, Ear & Rhythm Training on Android 4.0.3+
You'll need about 9.5 MB of free space.
- Download the APK — tap Download APK above (4.7 MB). Chrome shows “File might be harmful” for every APK file; choose Download anyway only if you trust this file.
- Open the file — tap the download notification, or open Files › Downloads and tap com-evilduck-musiciankit-138-19031113-ab3715054a0d9274f37be76d20a0dfb8.apk.
- Allow the install (first time only) — Android 8 and later asks for permission the first time an app opens an APK: tap Settings in the prompt, turn on Allow from this source, then go back. Manual path: Settings › Apps › Special app access › Install unknown apps (on Samsung: Settings › Apps › ⋮ › Special access). On Android 7 and older: Settings › Security › Unknown sources.
- Check the file (optional) — the MD5 of the downloaded file should be ab3715054a0d9274f37be76d20a0dfb8. If it differs, the file is damaged or was changed: delete it and download again.
- Tap Install — Android asks “Do you want to install this app?”. If Google Play Protect shows a warning, read it before you continue: the source store rated this file Trusted, but only install apps from sources you trust. If an earlier version is installed, this one only installs as an update when it is signed with the same certificate (SHA-1 shown above).
- Open Perfect Ear - Music Theory, Ear & Rhythm Training — tap Open on the install screen, or find it in your app drawer.
Common install problems
- “App not installed” — a version signed with a different certificate, or a newer version, is already installed (Android doesn't allow downgrades). Uninstall it first; back up your data, because uninstalling deletes it.
- “There was a problem parsing the package” — the file is incomplete, or your Android is too old (this version needs Android 4.0.3+). Download it again, or pick an older version.
- “App not compatible with your device” — this build contains native code for ARM (legacy), ARM 32-bit only. Devices with other processors can't install it.
- Blocked by Play Protect — Play Protect checks apps from outside the Play Store. Only continue if you trust the source.