Pricing
Credits, and that is it.
One challenge costs one credit. A new account starts with three, which today covers the whole library. No subscription, no card.
3
credits when you create an account
1
credit to open a challenge
$0
is what you pay today
Reopening costs nothing
Once a challenge is open it stays open on your account. Going back to reread it, revise what you wrote or compare it with the solution never costs another credit.
Buying credits does not exist yet
Payments are one of the next pieces to build. If you burn through the three credits and want more before that, write to us on the contact page and we will sort it out.
When there is a price
It will still be per credit, with no mandatory subscription, and anyone who already has an account hears about it before anything changes.
Last updated: 26 August 2026.