Optical File Transfer
v0.0.17 · 9 MB · code 17
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File information
UpdatedApr 23, 2026
PublishedApr 23, 2026
Packagepl.pwrobel.opticalfiletransfer
Versionv0.0.17 (17)
Size9 MB
MD5f3b71e9db67ee2b3cd89b8c17022b5d5
Min SDK21
ABIsx86-64, armeabi-v7a, arm64-v8a
Malware scanTRUSTED
Signature SHA1B5:15:55:69:7E:79:D6:C3:95:28:8E:F3:FE:A6:AC:F4:68:C1:AA:BA
SignerCN=Pawel Wrobel, OU=Home, O=Home, L=Wroclaw, ST=Dolnoslaskie, C=PL
Total downloads5,000
This version5,000
DeveloperPaweł Wróbel
Age ratingEveryone
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
* 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
Security scan
TRUSTED
- Developer signature verified 2026-04-23
- Signature SHA1 B5:15:55:69:7E:79:D6:C3:95:28:8E:F3:FE:A6:AC:F4:68:C1:AA:BA
- File MD5 f3b71e9db67ee2b3cd89b8c17022b5d5
How to install Optical File Transfer v0.0.17 on Android 5.0 Lollipop+
Takes about 2 minutes. You'll need roughly 9 MB of free storage.
- Grab pl.pwrobel.opticalfiletransfer_17.apk — hit the Download button above (9 MB). If your browser warns about APK files, choose Keep or Download anyway — that warning fires on every APK, not just this one.
- Trust your browser to install — on Android 8+ go to Settings → Apps → Special access → Install unknown apps, pick the app you downloaded with (Chrome, Firefox, Files, etc.), and flip Allow from this source. On older Android, toggle Unknown sources under Security.
- (Optional) Verify the file — compute the MD5 of the downloaded APK and make sure it matches f3b71e9db67ee2b3…. Any difference means the file is corrupted or tampered — delete and re-download.
- Open the APK — tap the download notification, or find pl.pwrobel.opticalfiletransfer_17.apk in your Files app under Downloads, then tap it. Android's package installer will appear.
- Check the signer — the install screen will name the publisher. For this build it should read CN=Pawel Wrobel, OU=Home, O=Home, L=Wroclaw, ST=Dolnoslaskie, C=PL. If it doesn't match, cancel — you have the wrong file.
- Review permissions & tap Install — scroll the permission list, then confirm. If Play Protect flags it, tap Install anyway (this APK was scanned as TRUSTED).
- Done — open Optical File Transfer — tap Open on the install screen, or find the Optical File Transfer icon in your app drawer (this build targets x86-64/armeabi-v7a/arm64-v8a devices).
Common install errors for Optical File Transfer
- "App not installed" — usually means an older or differently-signed version is already on your device. Uninstall it first, then retry. Your data may be lost unless you back it up.
- "Parse error" — the APK is for a newer Android than yours. This version needs Android 5.0 Lollipop or later. Pick an older build from the versions list below.
- "There was a problem parsing the package" — the download was interrupted. Delete the file and re-download over Wi-Fi.
- Works on one phone but not another — this build ships x86-64/armeabi-v7a/arm64-v8a native code. Devices with a different CPU will reject it.