Photos never leave your device
There is no server. All processing happens on-device — your photos and records are never uploaded.
🔒 No server · Photos never leave your device
Measure clothes from one photo
No tape measure — right on the photo. Put an A4 sheet or a card next to the garment and take one shot.
Download on the App Store▷ Google Play coming soon
How it works
- 1
Shoot together
Place an A4 sheet or a card on the same flat surface as the garment and take one photo.
- 2
Detect reference
Otja finds the four corners and corrects perspective. If auto-detect struggles, tap the corners yourself.
- 3
Connect two points
Pick a category for slots like shoulder width, chest, and length. Connect two points to get cm.
- 4
Export
Copy the size chart, save or share an image with the lines drawn, or keep a record per item.
Why Otja
Built for secondhand sellers
Get length, shoulder width, and chest for listings on eBay, Depop, Vinted, Mercari — from one photo. Copy, share, keep records.
Keep your own sizes on file
Measure the clothes that fit you best, then compare with any listing’s size chart. Fewer sizing mistakes, fewer returns.
Honest about accuracy
Accuracy depends on how you shoot. Lay the garment flat, keep the reference on the same surface, and shoot as close to straight-down as you can. A large reference like A4 paper is recommended. The app warns you when you choose a small reference like a credit card, where long measurements may be less accurate.
Pro
Otja Pro
A single one-time purchase unlocks unlimited records, custom reference objects, all templates, and watermark removal. Core measuring is free.