Simple pricing

The demo is free and needs no account. A pass is for the part that remembers your work — quizzes and packs you can repeat, spaced repetition, and a plan that keeps your place.

Free$0

40 curated questions across all 8 categories — the same explanations and sources as the full bank
Your demo progress, kept in this browser — no account, no email
2 of the 24 coding exercises to write and run in your browser — no account, and your code is never uploaded
Nothing that remembers your work — no saved quizzes, spaced repetition or progress

Start the free demo

Recommended

Full access—

A one-time pass, not a subscription — it never auto-renews.

Three months is the recommendation because it matches how long preparing for these interviews usually takes — long enough for spaced repetition to do its work, and you can extend later without losing your history.

Everything in Free

Practice

All 983 questions currently in the bank — full text, options, and sources
Timed, scored quizzes, with every attempt kept in your history
Start any of the 49 practice packs, and repeat them
22 more coding exercises, each with a worked solution

Retention

Spaced repetition that schedules each next review for you
A guided study plan, with your completed steps saved

Insight

See your accuracy per category as you practise, and which areas are weakest
Saved exercise attempts, so you can see what you solved and what took tries

What's in the question bank

Every category below is included with a full-access pass. Counts are live, not a marketing estimate — they are what the bank holds today, and it changes as we add, correct, replace and retire material.