
At a glance
- Latest version
- v3.1 (29)
- Updated
- Sep 23, 2025 (1 year ago)
- APK size
- 315.5 KB
- Requires
- Android 3.0+ (API 11)
- CPU support
- Any (no native code)
- Category
- Education (app)
- Listed since
- Nov 13, 2019 (at least)
- Permissions
- 3
- Website
- bit.ly/gk-apps
- Developer contact
- [email protected]
- Privacy
- Developer's privacy policy
About this APK
Matrix Operations Calculator is an app by GK Apps in the Education category, listed since at least November 2019. It has no native code, so it runs on any Android processor.
Since version 3.0, the APK shrank from 355.7 KB to 315.5 KB. It asks for 3 permissions, none of them sensitive. Compared with version 3.0, it adds 1 new permission: “Google Play install referrer”.
Description
From the listing uploaded by “catappult”.
Version history
2 versions are listed, going back to v3.0.
Security & authenticity
Signing certificate
- Certificate issued to “Georg Kiefer” Not the developer's name (“GK Apps”). Names in certificates can't be verified, so this alone proves nothing.
- Same certificate as the other version checked
Store checks and file details
- Developer signature verified Feb 27, 2021
- Signed byCN=Georg Kiefer, L=Koblenz, ST=Germany, C=DE
- Signing certificate (SHA-1)75:C9:81:67:02:93:40:62:AE:2C:C2:9B:5F:B5:47:43:3B:A7:F0:52
- File MD5470bd5336d762404f8c02ece3a65832b
- Uploaded by “catappult” Platinum tier · 1,377 followers · uploading since 2018
Scans and ratings come from the source store; the certificate comparisons are AAPKs's own, made from the files' published signatures (1 other version compared). AAPKs doesn't scan files itself — compare the MD5 and signer after downloading.
Permissions (3)
Matrix Operations Calculator requests 3 permissions, none of them sensitive.
- Full network access android.permission.INTERNET
- Google Play install referrer com.google.android.finsky.permission.BIND_GET_INSTALL_REFERRER_SERVICE
- View network connections android.permission.ACCESS_NETWORK_STATE
Required hardware & features
- Basic touch input android.hardware.faketouch
Matrix Operations Calculator APK: questions and answers
Can I install this APK over the version I already have?
Only if it is signed with the same certificate as the copy on your phone and isn't an older version. If Android says “App not installed”, the certificates differ; uninstalling your copy first works but deletes its data unless it is backed up.
Is the Matrix Operations Calculator APK safe?
No one can promise that a file is safe, but some things can be checked. The source store rates this file Trusted. It is signed with the same certificate as the other version checked. After downloading, check that the file's MD5 is 470bd5336d762404f8c02ece3a65832b.