Anolinx
AI polygon labeling for ML
Free · In‑App Purchases
iPad
Video annotation is here. Outline an object in one frame and Anolinx follows it through the whole video — frame extraction to export, all on your iPad.
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.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Anotix is now “Anolinx.” All features and purchases carry over.
New
• Video annotation (Pro): annotate one frame, track the object across the entire video
• Bulk frame extraction: import long videos quickly
• Line annotation for roads, rings, and boundaries (CULane export)
• Expanded EXIF metadata
Improvements
• Fixed COCO import issues
• Fixed split export failing on video-frame projects
• Fully revised English localization
The developer, Masayuki Takeuchi, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Masayuki Takeuchi
- Size
- 128.7 MB
- Category
- Developer Tools
- Compatibility
Requires iPadOS 26.2 or later.
- iPad
Requires iPadOS 26.2 or later.
- iPad
- Languages
- English and Japanese
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Anolinx Pro $49.99
- Anotix Full $34.99
- Copyright
- © 2026 Masayuki Takeuchi