Study for free. Pay for more AI.

The full study platform is free. Upgrade for more AI requests.

Free
$0/forever

Full access to the study platform. 10 AI requests per day.

Get Started
Recommended
Monthly
$4.97/month

500 AI requests per month. No API key needed.

Start Monthly

Every plan includes everything

No feature gates. Both plans get the full study platform and all AI tools. The only difference is how many AI requests you get.

Spaced repetition
SM-2 scheduling with skip, progress tracking, and flash cards
In-browser code editor
Python, TypeScript, and Ruby with test execution
Practice mode
Retype solutions from memory, verify with tests
Visualization builder
12+ data structures with frame-by-frame stepping
Community sharing
Publish editorials, browse and clone others' work
Problems and decks
Unlimited problems, decks, and flashcards
AI-powered features

All AI features run on Claude Haiku and share a single request pool. Bring your own API key on any plan for unlimited requests with your choice of model.

10
per day
Free
500
per month
$4.97
Hints during review
Flash card chat
Mock interview
Visualization generation
Editorial drafting
Editorial accuracy check
Test case generation

Frequently asked questions