How it works

Try it with no sign-up: 20 photos on us. Upload a photo, watch it being read, get explanations only where you need them, then retry from your notebook.

Answers are decided in this order: book answer key, then your own input, then the AI estimate.

Copyright: the original text you upload is visible only to you; only problem-type codes and counts of right and wrong answers are ever shared; book and publisher names stay inside your own notebook.