Two people and a question bank.

We do. Every item is written in-house against the Enhanced ACT blueprint — the 2026 format, with Science optional and the composite drawn from English, Math and Reading.

Nothing is scraped, and no released ACT item is reproduced or paraphrased. That is a legal line and an educational one: a question copied from a real test teaches you that test, not the skill.

Before a question can reach a student it is solved blind, three times, by independent checkers that never see the answer key. Three out of three agreeing advances it. Two out of three advances it flagged for a human to read. Anything below that is pulled.

If all three checkers agree on the same wrong answer, the item is rejected outright — that pattern almost always means the key itself is wrong, and it is the failure a student would never be able to argue with.

A separate pass then argues the opposite case: given the key, it tries to prove some other choice is also defensible. Items with two defensible answers do not ship.

Ribbit is a paid subscription, from $33/mo. Cancel any time from Settings. The diagnostic and your score report stay free — you see where you stand before you decide anything.

We would rather find out what the model gets wrong on a few thousand real sprints than charge for the version that has not met them yet.

Your answers train your plan. They are not sold, and they are not used to build a profile of you for anyone else. The privacy page lists exactly what is stored, in plain English, including how to delete it.

The countdown on this site is the official ACT national calendar, transcribed by hand from act.org and last checked on 2026-08-05. It is a real deadline, so it is the only urgency we use. There are no invented timers and no “spots remaining” anywhere on this site.