
At a glance
- Latest version
- v2.1.6 (11)
- Updated
- Sep 16, 2025 (1 year ago)
- APK size
- 4.2 MB
- Requires
- Android 4.0+ (API 14)
- CPU support
- Any (no native code)
- Graphics
- OpenGL ES 2.0+
- Category
- Education (app)
- Listed since
- Jan 21, 2021 (at least)
- Permissions
- 11 (1 sensitive)
- Developer contact
- [email protected]
- Privacy
- Developer's privacy policy
About this APK
Physical mechanical problems is an app by Amayuki in the Education category, listed since at least January 2021. It has no native code, so it runs on any Android processor.
It asks for 11 permissions, 1 of them sensitive: display over other apps.
What's new in v2.1.6
Description
From the listing uploaded by “catappult”.
Security & authenticity
Signing certificate
- Certificate issued to “Amaia” Not the developer's name (“Amayuki”). Names in certificates can't be verified, so this alone proves nothing.
Store checks and file details
- Developer signature verified Nov 8, 2021
- Antivirus scan result not available
- Signed byCN=Amaia
- Signing certificate (SHA-1)A4:91:26:A0:61:DE:CE:4A:F8:EE:E6:0D:B9:EA:F3:C6:1F:37:43:F5
- File MD52ab0c373e5de3693350625490c2bccba
- 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. AAPKs doesn't scan files itself — compare the MD5 and signer after downloading.
Permissions (11)
Physical mechanical problems requests 11 permissions, 1 of them sensitive.
- Display over other apps Sensitive android.permission.SYSTEM_ALERT_WINDOW
- Add home-screen shortcuts com.android.launcher.permission.INSTALL_SHORTCUT
- Browser read history bookmarks (custom) com.android.browser.permission.READ_HISTORY_BOOKMARKS
- Browser write history bookmarks (custom) com.android.browser.permission.WRITE_HISTORY_BOOKMARKS
- Full network access android.permission.INTERNET
- Prevent the device from sleeping android.permission.WAKE_LOCK
- Push messaging (app-defined) com.amayuki.fisica.permission.C2D_MESSAGE
- Receive push notifications com.google.android.c2dm.permission.RECEIVE
- Remove home-screen shortcuts com.android.launcher.permission.UNINSTALL_SHORTCUT
- Run at startup android.permission.RECEIVE_BOOT_COMPLETED
- View network connections android.permission.ACCESS_NETWORK_STATE
Required hardware & features
- Basic touch input android.hardware.faketouch
Physical mechanical problems 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 Physical mechanical problems APK safe?
No one can promise that a file is safe, but some things can be checked. The source store rates this file Trusted. After downloading, check that the file's MD5 is 2ab0c373e5de3693350625490c2bccba.