What posta does differently
No streaks, no points, no red counters.
«Nothing counts that isn't learning» — that is the principle in the architecture document, and it is carried through. The home screen shows how long today's session takes and what is in it. No number answers how good you are.
Your learning state lives locally in the browser, not on a server — the app works fully in flight mode, from lessons to lexicon. An account is optional and only serves to sync between two devices; without one you lose no functionality.
Repetition follows the research: spaced repetition with FSRS, tracked separately per expression for whether you understand it or can say it yourself. The daily plan is built fresh every morning from your own learning state. And accessibility is an acceptance criterion, not an afterthought: every screen is automatically checked against WCAG 2.1 AA, with font-size and contrast settings in the app.
Craft behind the scenes: lessons and vocabulary live as validated data, not code — a custom checker raises the alarm if a tú slips into an Argentinian dialogue. Around 500 audio clips with Argentinian voices come from a dedicated audio pipeline. On start, the app deliberately loads a capped 180 KB of JavaScript.
