Optical File Transfer v0.0.17
APK · 9 MB · version code 17 · Android 5.0+ · uploaded Apr 23, 2026
- Same certificate as the 4 other versions checked 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 v0.0.23, uploaded May 14, 2026 — about 20 days after this one.
- Size: this file is 9 MB; the latest is 9.7 MB (679.9 KB larger).
- The latest version no longer asks for: Run foreground services, Foreground service camera, Write settings.
File information
- Version
- v0.0.17 (17)
- Uploaded
- Apr 23, 2026
- Size
- 9 MB
- Requires
- Android 5.0+ (API 21)
- CPU support
- x86 64-bit, ARM 32-bit, ARM 64-bit
- Graphics
- OpenGL ES 2.0+
- Screen
- Small screens and larger
- MD5
- f3b71e9db67ee2b3cd89b8c17022b5d5
- Signing certificate (SHA-1)
- B5:15:55:69:7E:79:D6:C3:95:28:8E:F3:FE:A6:AC:F4:68:C1:AA:BA
- Signed by
- CN=Pawel Wrobel, OU=Home, O=Home, L=Wroclaw, ST=Dolnoslaskie, C=PL
- File name
- pl-pwrobel-opticalfiletransfer-17-74472670-f3b71e9db67ee2b3cd89b8c17022b5d5.apk
- Package
- pl.pwrobel.opticalfiletransfer
- Downloads (all versions)
- 5K+
- Age rating
- PEGI 3 · Everyone
What's new in v0.0.17
* New Android and Camera2 API support
* The packaged desktop HTML web app now supports download and upload
* Updated ZXing library - better QR recognition rate
* Added automatic 7z support for transferred data under the hood
* Better multithreaded support for individual QR frame recognition
* Updated file selector component with thumbnail preview generation
* Improved file sharing support
Permissions (6)
This version requests 6 permissions, 3 of them sensitive.
- Access all files Sensitive android.permission.MANAGE_EXTERNAL_STORAGE
- Camera Sensitive android.permission.CAMERA
- Write settings Sensitive android.permission.WRITE_SETTINGS
- Foreground service camera android.permission.FOREGROUND_SERVICE_CAMERA
- Internal broadcast protection (app-defined) pl.pwrobel.opticalfiletransfer.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION
- Run foreground services android.permission.FOREGROUND_SERVICE
Security & authenticity
Security rating: Trusted
Signing certificate
- Certificate issued to “Home” Not the developer's name (“Paweł Wróbel”). Names in certificates can't be verified, so this alone proves nothing.
- Same certificate as the 4 other versions checked
Store checks
- Developer signature verified Apr 23, 2026
- Uploaded by “catappult” Platinum tier · 1,377 followers · uploading since 2018
Scans come from the source store; the certificate comparisons are AAPKs's own, made from the files' published signatures (4 other versions compared). AAPKs doesn't scan files itself.
How to install Optical File Transfer on Android 5.0+
You'll need about 18 MB of free space.
- Download the APK — tap Download APK above (9 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 pl-pwrobel-opticalfiletransfer-17-74472670-f3b71e9db67ee2b3cd89b8c17022b5d5.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 f3b71e9db67ee2b3cd89b8c17022b5d5. 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 Optical File Transfer — 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 x86 64-bit, 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.