8 exercises free.
The rest for one coffee a month.
The free ones are not a demo. Same battery, same real Postgres, and they are not the easy exercises. Start there. Subscribe when you want the other 12.
Monthly
$12/month
Cancel any time, from the same place you subscribed.
Annual
$99/year
Two months off, and no renewal to think about.
Both plans include
- Every exercise across all six tracks
- Your DDL run on a real Postgres, not a parser
- The hidden battery, with a hint on each test you fail
- A design review of naming, types and trade-offs
- Progress and best score kept per exercise
Cancelling
One button, in the Stripe portal, and it takes effect at the end of the period you already paid for. No email, no retention flow.
The card never touches this server
Checkout and the billing portal are both hosted by Stripe. Nothing about your payment method is stored here, because none of it arrives here.