RSJ Guitar

For beginners who want to start playing acoustic guitar.

Rush Cho · com.rushchoinfo.rushsjguitar

3.0 out of 5 (1 rating) 10K+ downloads v10.1 10.6 MB Android 8.1+ PEGI 3 · Everyone

Download APK 10.6 MB All versions

Signature matches the Google Play version Details

At a glance

Latest version: v10.1 (101)
Updated: Mar 22, 2026 (7 months ago)
APK size: 10.6 MB
Requires: Android 8.1+ (API 27)
CPU support: Any (no native code)
Category: Education (app)
Listed since: Mar 14, 2021 (at least)
Permissions: 10
Website: youtube.com/user/rushcho1
Developer contact: [email protected]
Privacy: Developer's privacy policy

About this APK

RSJ Guitar is an app by Rush Cho in the Education category, listed since at least March 2021. It has no native code, so it runs on any Android processor.

Since version 6.5, the APK grew from 7 MB to 10.6 MB. It asks for 10 permissions, none of them sensitive. Compared with version 7.2, it adds 3 new permissions (“Access adservices ad id”, “Access adservices attribution” and “Access adservices topics”) and drops 1 (“Run at startup”). The app offers in-app purchases through Google Play and can read the advertising ID that ad and analytics services use.

Description

From the listing uploaded by “appupdater”.

RSJ Guitar is an app for beginners who want to start playing acoustic guitar. With RSJ Guitar, you can practice two techniques. 1) Stroke Patterns Select a pattern and press the start button to begin. You can follow the on-screen pick movements. 2) Chord Progressions Press the chord progression button, set the scale, and try to guess the next chord.

Version history

4 versions are listed, going back to v6.5.

v10.1 LATEST Mar 22, 2026 10.6 MB TRUSTED v7.2 Mar 21, 2026 8.9 MB TRUSTED v7.1 Mar 24, 2024 8.9 MB TRUSTED v6.5 Aug 25, 2023 7 MB TRUSTED

All 4 versions

Security & authenticity

Security rating: Trusted

Signing certificate

Signature matches the Google Play version Checked by the source store on Mar 22, 2026.
Same certificate as the 2 other versions checked

Store checks and file details

Developer signature verified Mar 22, 2026
Validated against Google Play Mar 22, 2026
Signed byST=SEOUL
Signing certificate (SHA-1)94:EB:22:B6:6B:44:3E:8C:9D:D3:43:24:90:3F:D3:80:6D:93:9E:7A
File MD58411ad38f611f0695c291a6721d00d66
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 (10)

RSJ Guitar requests 10 permissions, none of them sensitive.

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
In-app purchases (Google Play Billing) com.android.vending.BILLING
Internal broadcast protection (app-defined) com.rushchoinfo.rushsjguitar.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION
Prevent the device from sleeping android.permission.WAKE_LOCK
Run foreground services android.permission.FOREGROUND_SERVICE
View network connections android.permission.ACCESS_NETWORK_STATE

Required hardware & features

Basic touch input android.hardware.faketouch
Portrait screen android.hardware.screen.portrait

RSJ Guitar APK: questions and answers

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 RSJ Guitar free?

The APK is free to download, but the app offers in-app purchases through Google Play.

Is the RSJ Guitar 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 8411ad38f611f0695c291a6721d00d66.