Pricing
One credit is one Easy problem.
A Medium costs 2, a Hard costs 4 — a harder problem is a longer conversation. Spend your credits on whatever mix you want.
Build a month
Add the problems you want. The bar is what they cost.
DifficultyCostHow manyCredits
Easy
1 credit each
4
Medium
2 credits each
12
Hard
4 credits each
12
28 credits of 30 · 2 to spare
Starter covers this at $19/mo.
Annual plans get two months free. Credit packs are $12 for 12 credits and expire 90 days after purchase. The free trial draws from a fixed 9-problem starter set — the same problems for everyone, in the same order — and 6 credits covers about six of them. Paid plans draw from the full curated library and follow the topic you ask for.