FairScan
An Android app to scan your documents —
simple and respectful.
---
FairScan is an Android app to **scan documents quickly, easily and privately**.
It's designed to be **simple**: users get a clean, shareable PDF in seconds, with no manual adjustments.
And **respectful**: open source, minimal permissions, no tracking, no ads.
- Website: https://fairscan.org
- Blog: https://fairscan.org/blog/
---
## Screenshots
| Scan | Preview | Save & Share |
|------|---------|--------------|
|  |  |  |
---
## Features
- **Clear, distraction-free interface**
- **Easy scanning process**: scan → preview → share
- **Automatic document detection** using a custom segmentation model
- **Automatic perspective correction**
- **Automatic image enhancement**
- **Fast PDF generation** with no manual adjustments
- **Fully offline** – the app has *no* internet permission
- **Minimal permissions**
- **Open source**, GPLv3
---
## Compatibility
FairScan works on any device that:
- runs **Android 8.0+**
- has a camera
---
## Technical details
FairScan uses:
- [Jetpack Compose](https://developer.android.com/compose) for the UI
- [CameraX](https://developer.android.com/media/camera/camerax) for image capture
- [LiteRT](https://ai.google.dev/edge/litert) to run the custom segmentation model for automatic document detection
- [OpenCV](https://opencv.org/) for perspective correction and image enhancement
- [PDFBox-Android](https://github.com/TomRoush/PdfBox-Android) for PDF generation
---
## The segmentation model
FairScan uses a custom-trained image segmentation model to detect documents:
https://github.com/pynicolas/fairscan-segmentation-model
It's based on a fully public dataset that is available here:
https://github.com/pynicolas/fairscan-dataset
The build system automatically downloads the model using
[`download-tflite.gradle.kts`](app/download-tflite.gradle.kts).
Related blog posts:
- [*Making document detection more reliable*](https://fairscan.org/blog/automatic-document-detection/)
- [*Building a public dataset for FairScan*](https://fairscan.org/blog/building_a_public_dataset/)
---
## Build
To build an APK:
```bash
./gradlew clean check assembleRelease
```
To build an Android App Bundle:
```bash
./gradlew clean check :app:bundleRelease
```
## License
This project is licensed under the GNU GPLv3. See [LICENSE](LICENSE) for details.