Learn free. Pay only for courses made for you.
Every course in the gallery is free to study. Buy credits when you want the AI to build a course on your own topic.
Credits are valid for 12 months. New accounts can claim free credits for a first custom course while this month's batch lasts.
Free to start
The whole course gallery, quizzes and progress tracking cost nothing. New accounts can also claim credits for a first custom course while this month's batch lasts.
What you get
- Every gallery course, free to study
- Copy courses to your library and track your progress
- Quizzes and progress tracking on every course
- Custom courses on any STEM topic (uses credits)
- AI tutor chat for every lesson (uses credits)
Bring Your Own Key
Prefer your own AI provider API key? Add it in Settings: you pay the provider directly and use no credits.
Credits are valid for 12 months
Credit costs per action may be adjusted periodically.
Have an access code?