Prime Ruler - length measurement by camera, screen v4.0.8
APK · 1.8 MB · version code 35 · Android 2.3+ · uploaded Nov 7, 2015
- Same certificate as v5.1.2, which matches Google Play Details
Quick check before downloading
Answer this to unlock the download. It keeps automated downloaders away.
Compared with the latest version
The latest version is v5.1.2, uploaded Jul 6, 2026 — about 10 years after this one.
- Size: this file is 1.8 MB; the latest is 4.2 MB (2.4 MB larger).
- Android: this version needs Android 2.3+; the latest needs Android 4.0+. Use this one if your device runs an older Android release.
- The latest version asks for 5 more permissions: Control vibration, Prevent the device from sleeping, In-app purchases (Google Play Billing), Receive push notifications, Push messaging (app-defined).
File information
- Version
- v4.0.8 (35)
- Uploaded
- Nov 7, 2015
- Size
- 1.8 MB
- Requires
- Android 2.3+ (API 9)
- CPU support
- Any (no native code)
- Screen
- Small screens and larger
- MD5
- be397d6025ad6c86a0846bc47c620f7b
- Signing certificate (SHA-1)
- 2A:BE:7D:A2:82:8C:BB:95:DF:62:CD:AB:97:74:A8:78:17:A8:F3:14
- Signed by
- CN=Pavel Prybytak, C=UK
- File name
- com-grymala-photoruler-35-12802692-be397d6025ad6c86a0846bc47c620f7b.apk
- Package
- com.grymala.photoruler
- Downloads (all versions)
- 10M+
- Age rating
- PEGI 3 · Everyone
What's new in v4.0.8
* Minor bug fixes
Permissions (5)
This version requests 5 permissions, 3 of them sensitive.
- Camera Sensitive android.permission.CAMERA
- Modify shared storage Sensitive android.permission.WRITE_EXTERNAL_STORAGE
- Read shared storage Sensitive android.permission.READ_EXTERNAL_STORAGE
- Full network access android.permission.INTERNET
- View network connections android.permission.ACCESS_NETWORK_STATE
Security & authenticity
Security rating: Trusted
Signing certificate
- Certificate issued to “Pavel Prybytak” This is the certificate of the Google Play version.
- Same certificate as v5.1.2, which matches Google Play v5.1.2
Store checks
- Developer signature not verified Nov 10, 2021
- Antivirus scan passed Nov 13, 2020
- Uploaded by “abfahr” 188 followers · uploading since 2015
Scans 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.
How to install Prime Ruler - length measurement by camera, screen on Android 2.3+
You'll need about 3.5 MB of free space.
- Download the APK — tap Download APK above (1.8 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-grymala-photoruler-35-12802692-be397d6025ad6c86a0846bc47c620f7b.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 be397d6025ad6c86a0846bc47c620f7b. 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 Prime Ruler - length measurement by camera, screen — 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 2.3+). Download it again, or pick an older version.
- Blocked by Play Protect — Play Protect checks apps from outside the Play Store. Only continue if you trust the source.