ruff: a writing companion v2023.07.05
APK · 14.4 MB · version code 172 · Android 5.0+ · uploaded Jun 7, 2024
- Same certificate as v2025.02.24, 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 v2025.02.24, uploaded Aug 1, 2026 — about 2 years after this one.
- Size: this file is 14.4 MB; the latest is 17.8 MB (3.5 MB larger).
- The latest version asks for 3 more permissions: View network connections, Full network access, Internal broadcast protection (app-defined).
File information
- Version
- v2023.07.05 (172)
- Uploaded
- Jun 7, 2024
- Size
- 14.4 MB
- Requires
- Android 5.0+ (API 21)
- CPU support
- ARM 32-bit, ARM 64-bit
- Screen
- Small screens and larger
- MD5
- a75f4df5d27aa782786dd38848d292b4
- Signing certificate (SHA-1)
- 7E:C7:F1:1A:55:3B:D6:91:C9:15:81:FE:B9:EB:97:BB:1E:7D:D7:80
- Signed by
- CN=Android, OU=Android, O=Google Inc., L=Mountain View, ST=California, C=US
- File name
- ruff-ruff-172-67877353-a75f4df5d27aa782786dd38848d292b4.apk
- Package
- ruff.ruff
- Downloads (all versions)
- 100K+
- Age rating
- PEGI 3 · Everyone
What's new in v2023.07.05
Targeting Android 12 and upgraded to latest Google Play billing library for better performance + security + compatibility.
Permissions (4)
This version requests 4 permissions, 1 of them sensitive.
- Modify shared storage Sensitive android.permission.WRITE_EXTERNAL_STORAGE
- Google Play license check com.android.vending.CHECK_LICENSE
- In-app purchases (Google Play Billing) com.android.vending.BILLING
- Run at startup android.permission.RECEIVE_BOOT_COMPLETED
Security & authenticity
Security rating: Trusted
Signing certificate
- Certificate from Google Play App Signing Google keeps the signing key for the developer, so the certificate carries Google's name.
- Same certificate as v2025.02.24, which matches Google Play v2025.02.24
Store checks
- Developer signature verified Jun 7, 2024
- Uploaded by “appupdater” Gold tier · 117,810 followers · uploading since 2020
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 ruff: a writing companion on Android 5.0+
You'll need about 28.8 MB of free space.
- Download the APK — tap Download APK above (14.4 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 ruff-ruff-172-67877353-a75f4df5d27aa782786dd38848d292b4.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 a75f4df5d27aa782786dd38848d292b4. 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 ruff: a writing companion — 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 5.0+). Download it again, or pick an older version.
- “App not compatible with your device” — this build contains native code for ARM 32-bit, ARM 64-bit only. Devices with other processors can't install it.
- Blocked by Play Protect — Play Protect checks apps from outside the Play Store. Only continue if you trust the source.