Every plan uses the same four AI engines. Free comes with $3 of AI credits that never expire — roughly 1,500 messages. Paid plans add more AI each month plus features Free can't use.
| What you get | Free | Student | Pro |
|---|---|---|---|
| 4-engine AI tutor chat | ✓ | ✓ | ✓ |
| Quizzes, flashcards & progress | ✓ | ✓ | ✓ |
| Progress synced across devices | ✓ | ✓ | ✓ |
| AI included | $3 lifetime | $8 / mo | $30 / mo |
| ⚡ All-4 engine compare mode | — | ✓ | ✓ |
| Priority AI generation | — | ✓ | ✓ |
| Solvable Guess Papers | — | — | ✓ |
| Codex — AI app builder | — | — | ✓ |
| Early access to new features | — | — | ✓ |
Yes. Every new account gets $3 of AI credits — about 1,500 messages — that never expire. No card, no trial countdown. When you run out, you can upgrade or keep using the non-AI study tools.
Instead of a confusing token count, we show the real AI budget. $3 covers roughly 1,500 tutor messages. Student and Pro top that up with $8 and $30 of AI every month.
Student adds the ⚡ All-4 compare mode (four AI answers side by side) and priority generation. Pro adds Solvable Guess Papers and Codex, our AI app builder, plus early access to new features.
Yes — plans are monthly and you can cancel whenever you like. You keep access until the end of the period.