
Music Theory Companion
Music theory, scales, chords, ear training & songwriting tool for all musicians
PG App Studio · app.pg.scalechordprogression
- Signature matches the Google Play version Details
At a glance
- Latest version
- v9.0.3 (123)
- Updated
- Oct 1, 2026 (9 days ago)
- APK size
- 14.2 MB
- Requires
- Android 7.0+ (API 24)
- CPU support
- x86 64-bit, ARM 32-bit, ARM 64-bit
- Category
- Education (app)
- Listed since
- Jul 17, 2021 (at least)
- Permissions
- 16 (1 sensitive)
- Website
- pgappstudio.com
- Developer contact
- [email protected]
- Privacy
- Developer's privacy policy
About this APK
Music Theory Companion is an app by PG App Studio in the Education category, listed since at least July 2021. It includes native code for x86 64-bit, ARM 32-bit and ARM 64-bit, so it runs on practically every phone.
Since version 2.4.4, the minimum Android version rose from 5.0 to 7.0. It asks for 16 permissions, 1 of them sensitive: record audio. It asks for the same permissions as version 9.0.2. The app offers in-app purchases through Google Play and can read the advertising ID that ad and analytics services use.
What's new in v9.0.3
Description
From the listing uploaded by “appupdater”.
Version history
6 versions are listed, going back to v2.4.4. Since v8.1.1 it requires Android 7.0+.
Security & authenticity
Signing certificate
- Signature matches the Google Play version Checked by the source store on Oct 1, 2026.
- Certificate issued to “self” 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 Oct 1, 2026
- Validated against Google Play Oct 1, 2026
- Signed byCN=Prasenjit Ghosh, OU=self, O=self, L=Kolkata, ST=West Bengal, C=700091
- Signing certificate (SHA-1)D7:46:07:5D:1C:46:43:04:5A:30:BD:31:E8:E5:4D:B2:27:69:1B:5B
- File MD519daee41a5cf974a14a38633c0d10036
- 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 (16)
Music Theory Companion requests 16 permissions, 1 of them sensitive.
- Record audio (microphone) Sensitive android.permission.RECORD_AUDIO
- Access adservices ad id android.permission.ACCESS_ADSERVICES_AD_ID
- Access adservices attribution android.permission.ACCESS_ADSERVICES_ATTRIBUTION
- Access adservices topics android.permission.ACCESS_ADSERVICES_TOPICS
- Advertising ID com.google.android.gms.permission.AD_ID
- Full network access android.permission.INTERNET
- Google Play install referrer com.google.android.finsky.permission.BIND_GET_INSTALL_REFERRER_SERVICE
- In-app purchases (Google Play Billing) com.android.vending.BILLING
- Internal broadcast protection (app-defined) app.pg.scalechordprogression.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION
- Modify audio settings android.permission.MODIFY_AUDIO_SETTINGS
- Prevent the device from sleeping android.permission.WAKE_LOCK
- Read basic phone state android.permission.READ_BASIC_PHONE_STATE
- Receive push notifications com.google.android.c2dm.permission.RECEIVE
- Run foreground services android.permission.FOREGROUND_SERVICE
- Show notifications android.permission.POST_NOTIFICATIONS
- View network connections android.permission.ACCESS_NETWORK_STATE
Required hardware & features
- Basic touch input android.hardware.faketouch
- Microphone android.hardware.microphone
- Landscape screen android.hardware.screen.landscape
- Portrait screen android.hardware.screen.portrait
Music Theory Companion APK: questions and answers
Is there a version of Music Theory Companion for older Android phones?
The current version needs Android 7.0 or later. Version 7.5.3 is the newest listed build that installs on Android 6.0 and later. Get version 7.5.3 · 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 Music Theory Companion free?
The APK is free to download, but the app offers in-app purchases through Google Play.
Is the Music Theory Companion 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 19daee41a5cf974a14a38633c0d10036.