Try it free. Then go pro.
Start free with every feature unlocked. Upgrade for a bigger monthly credit allowance — cancel anytime.
Free
Every feature unlocked. Credits are the only limit.
- All features unlocked — credits are the only meter
- AI lessons & roadmaps (20 credits / lesson)
- Mock interviews (5 credits / min)
- AI mentor chat & code review
- 250-problem catalog + real code judge
- Spaced-repetition review & progress tracking
No card needed · all features included
Pro
Go deep on everything you're learning.
- 5 active goals
- Early access to new learning tools
- AI lessons (20 credits)
- 5 free lesson redesigns / month (then 10 credits)
- Priority lesson generation
- Unlimited AI mentor
- Mock interviews (5 credits / min)
$7/mo · cancel anytime
Max
Learn at full speed, no friction.
- Unlimited goals
- Early access to new learning tools
- AI lessons (20 credits)
- 10 free lesson redesigns / month (then 10 credits)
- Highest generation priority
- Unlimited AI mentor & mock interviews (5 credits / min)
- 5,000 monthly credits
$14/mo · cancel anytime
All prices include VAT where applicable.
| AI lesson | 20 credits |
| Lesson redesign | 10 credits |
| Mock interview (per minute) | 5 credits / min |
| Generated problem | 2 credits |
| Generate code review challenge | 2 credits |
| Reveal AI solution | 1 credits |
| AI code review / coach | 1 credits |
| Explain my mistake | 1 credits |
| Big-O complexity analysis | 1 credits |
| Copilot selection fix | 1 credits |
| Lesson read-along | 1 credits |
Always free & unlimited
Start free. Upgrade when you need more.
Every account gets every feature, with 300 free credits each month — no card needed. Upgrade or top up only when you want a bigger allowance.
Questions, answered.
Only heavy AI generation — an AI lesson (20), a custom generated problem (2), a mock interview (5 / min), a lesson redesign (10). See the full breakdown above. Solving, running code, hints on catalog problems, mentor chat and daily review never cost credits.
Yes — every account starts on the Free plan with all features unlocked: AI lessons, mock interviews, code review and everything else, powered by free monthly credits. Upgrade anytime for a bigger allowance. Students get an extra 20% off with a .edu email.
Everything free keeps working. For more generation, top up (from $5, credits never expire) or upgrade — your bundle refills monthly.
Yes. Upgrades apply instantly, cancellations at the end of the period. Unused top-up credits stay yours.
Yes — in an isolated sandbox with real compilers for all 13 languages. Verdicts, runtime and memory come from actual execution, never from an AI guess.
Free to start. Hard to outgrow.
Join now and solve your first verified problem in minutes.
Free forever · no card needed