Anolinx

Build datasets from video. Extract frames, annotate a single frame, and Anolinx tracks the object across the footage — extraction, annotation, and export, entirely on-device.
Anolinx is an iPad-only annotation studio for building machine learning datasets. Tap an object and on-device AI traces its outline into an editable polygon — then refine it with Apple Pencil. From first draft to export, everything happens on one iPad.

ON-DEVICE AI ASSIST
A single tap or stroke and the AI estimates the outline and turns it into a polygon. The model runs entirely on your device — no internet, no external servers. It works fully offline.

EIGHT ANNOTATION MODES
Polygon, bounding box, brush, eraser, trace-repair, one-tap AI, and more — switch freely on a single canvas.

PRECISE PENCIL EDITING
Adjust vertices one by one (up to 200 points per object). Edit freely even after committing. Your hand-drawn outline becomes the ground truth.

MULTI-CLASS
Add categories, assign colors, and filter by class. Mix multiple classes in one image to match real project requirements.

EXPORT TO MAJOR FORMATS
- COCO (JSON)
- YOLO (txt, 0-indexed class IDs)
- Pascal VOC (XML)
- Mask PNG
With train/val/test splitting and ZIP packaging. Structured and ready for training — no reformatting.

TWO-WAY COCO
Import COCO as well as export it. Bring in annotations made elsewhere and continue from there.

EXIF CORRECTION FOR REAL PHOTOS
Portrait or rotated shots are corrected automatically, so coordinates stay pixel-accurate across every export format.

LIBRARY & PROJECTS
Manage multiple projects in a thumbnail library.

YOUR DATA, YOUR CHOICE
Projects stay on your iPad by default — private, nothing uploaded to us, no tracking. Export your datasets anywhere via the share sheet: iCloud Drive, external drives, Files, AirDrop, or other apps.

WHO IT'S FOR
- ML engineers and researchers building custom detection or segmentation datasets
- Field experts who shoot and annotate on the spot
- Anyone who'd rather not hand their data to a vendor

PRICING
Free to use — all features included, with exports up to 30 images per format. A single one-time purchase unlocks unlimited exports. No subscription.

Annotate as art.