Fingerspelling practice with your camera
Pick a set, turn on your camera, and sign. Each handshape is checked as you make it, then the next letter or word comes up. Hand tracking runs in your browser, so the video never leaves your device.
How the check works
The page finds 21 points on your hand in each camera frame and measures how each finger is bent, where your thumb sits and which way your hand points. It knows which letter it asked for, and checks whether your hand is making it. Hold a still letter for about half a second; J and Z are checked by their movement.
It errs toward strict: a wrong handshape is accepted about one time in a hundred, and sometimes a correct one isn't. If a letter won't register, face the camera with your palm toward it, keep your whole hand in view, and use good light.
Practise every day, not for an hour once
A few minutes a day beats a long session. The daily practice brings each letter back just before you'd forget it, without the picture, so you sign it from memory, and tracks your streak.
Start daily practice