Every network request this page makes, live. "This device" means it never left your computer.
Try it with no network
Offline simulation is ON: the app now refuses every request that is not already saved on your device. Keep practising; everything should keep working.
What is stored
Practise fingerspelling A to Z
All 26 letters of the American Sign Language (ASL) manual alphabet, with live feedback from your camera on your hand shape. J and Z add their movement paths. Fingerspelling is how ASL spells names, places and words that have no sign yet.
A practice aid, not a teacher. Fingerspelling is part of ASL, the language of the Deaf community. For real learning, watch Deaf signers in the linked references, and consider a class taught by a Deaf instructor. Why this matters