Twelve years of lessons. Six months of an app. Then somebody at a counter asks you one ordinary question and your mind goes flat white.
…
Ich will ein Kaffee.
Ich möchte einen Kaffee.
"Kaffee" is masculine, so "ein" becomes "einen" as the object of möchte.
Einen Kaffee, bitte.
Ich bin fertig mit essen.
Ich bin satt, danke.
Yours means you finished a task. "Satt" is what people actually say.
Mistakes are quoted back in your own words, with how often they recurred — so you can hear the habit, not read a grade.
A 3-day free trial, then one simple plan — no per-minute meter, no upsell in the middle of a sentence.