Pricing
Pricing
Free
Every lesson, no card, no signup.
$0
no signup
- Every lesson on the SWE interview path
- Walkthroughs, hints, and bug-naming feedback
- Ask the AI tutor for help
- Pick any language: JavaScript, TypeScript, Python, C++, Java, Go, Rust, Dart
- Link an account later to keep your mastery
Algotrek Pro
Unlimited tutor, unlimited runs, signature interactives.
$79
one-time
- Signature interactive walkthroughs
- Unlimited AI tutor — answers grounded in your code
- Unlimited code runs across JavaScript, TypeScript, Python, C++, Java, Go, Rust, Dart
- Spaced-repetition review so what you learn stays learned
- Adaptive path that picks what to teach next
One purchase, yours forever.
Inside the lessons
Algorithm walkthrough
Watch every pattern in motion — two pointers converging, a hash map filling cell by cell, a tree expanding wave by wave. Every cursor labelled, every step explained.
Ask the tutor anything
Type a question in plain English. The answer stays inside this problem and the code you wrote — a learning aid, not an autocomplete.
Adapts to where you stand
The next lesson is always the one you're ready for. Stale concepts come back for review so what you learned stays learned.
One purchase. No subscription. Yours forever.