Simple pricing. No subscription.

Start with 20 free credits, no card. Then $20 for 100 credits, from $0.20 a question, valid for a year.

Try free. Pay only for what you ask.

No subscription. Credits last a year. A question uses 1–3 credits, and failed answers give the credits back.

Free trial

$0

20 credits · no card required · valid for 1 year

Try free

Credit pack

$20

100 credits · from $0.20 a questionⓘ · valid for 1 year · no subscription

  • The approach, runnable code and time and space complexity
  • Code in your editor's language: Python, JavaScript, TypeScript, Java, C++, C#, Go, Rust
  • Stack traces, unfamiliar code, slides and practice quizzes
  • Failed answers refund their credits
  • 7-day refund on unused packs (terms)

Need credits for a team, club or bootcamp? Contact us.

7-day refund on unused packs, terms apply

How far does $20 go?

Most questions use 1 credit, and longer ones up to 3. That's roughly 33 to 100 questions for $20. A typical week of daily practice uses about 20 to 40 credits.

Pricing questions

Team, club or bootcamp credits: Contact us.