Loose coupling, tight feedback

Good software and good learning share a shape: small pieces, clear seams, and a feedback loop that runs fast enough to keep you honest.

A shared core

The logic that matters — grading, progress, spaced repetition — lives in one framework-agnostic core. The web app, the mobile shell, and this marketing site all read from the same source of truth, so they can never quietly disagree.

Tight feedback

Every lesson ends with a check: a quiz, a graded answer, a passing test. You find out immediately whether it landed. That’s the same loop we use to ship the app — write the test, watch it fail, make it pass.