Download CellSeg

Free, open source. Android 8.0 (API 26) or later. No account required.

CellSeg
Free & open sourceAndroid 8.0+No account neededWorks offline
On-device cell segmentation · Cellpose cyto3 · ~26 MB model
⇓  Download latest APK All releases on GitHub ↗
Research use only. CellSeg is not a medical device and is not CE-marked or FDA-cleared. Do not use for clinical, diagnostic, or therapeutic decision-making.

Requirements

Requirement Minimum
Android version 8.0 (API 26)
App install size ~15 MB
Model (downloaded on first launch) ~26 MB
Recommended RAM 2 GB
Supported ABIs arm64-v8a, x86_64

How to install (sideload)

CellSeg is distributed as a direct APK — it is not on the Play Store.

  1. On your Android device go to Settings → Apps → Special app access → Install unknown apps.
  2. Grant your browser or file manager permission to install unknown apps.
  3. Tap Download latest APK above.
  4. Open the downloaded .apk file and tap Install.
  5. Launch CellSeg. On first run tap Download model to fetch the ~26 MB ONNX file (Wi-Fi recommended).
Tip: Keep the APK file after installation. You can reinstall from it without losing your run history — provided you don't uninstall first (history is stored in app-private storage and is deleted on uninstall).

Permissions

Permission Why it’s needed
CAMERA Capture microscopy images directly with the phone camera
READ_MEDIA_IMAGES / READ_EXTERNAL_STORAGE Import images from the gallery or a file manager
INTERNET Download the ONNX model on first use; optional cloud segmentation
WRITE_EXTERNAL_STORAGE (≤ API 28) Export CSV/images on older Android versions

All images and segmentation outputs are stored in app-private storage (/data/data/uk.yaylali.cellseg/) and are deleted automatically when the app is uninstalled. See the Privacy Policy for full details.

Verify the APK (optional)

Each GitHub release lists the SHA-256 hash of the APK. Verify on your desktop after downloading:

# macOS / Linux
sha256sum CellSeg-v0.1.0.apk

# macOS only
shasum -a 256 CellSeg-v0.1.0.apk

# Windows PowerShell
Get-FileHash CellSeg-v0.1.0.apk -Algorithm SHA256

Compare the output with the hash listed on the GitHub release page.

Open source

CellSeg is MIT-licensed. Source code is on GitHub. Third-party licences are listed on the About page and in the NOTICE file.