Review at the last useful moment
The scheduler estimates when each word is about to slip and brings it back just before it does, so you do fewer reviews and remember more. In Advanced Mode it fits itself to your own memory patterns.
The Method · the honest scheduler
Every word starts fading the moment you close the app. Tongueforge brings each one back while you still know it, about nine times out of ten, so you almost never fail and the gap to the next review keeps stretching. Drag the handle to see the fade it saves you from.
Drag the handle · or focus it and use ← →
Right about here — while you still know it 9 times out of 10. You almost never fail a review, and each success pushes the next return further out.
What it comes down to
The review format leans toward producing the answer, because that's where false confidence breaks.
Words, tenses and grammar live inside sentences, so your memory has something to hold on to.
Miss a word and the app points at the exact form you got wrong, not just a red X.
A review in motion
Every card asks you to produce the answer, then shows exactly what you missed, down to a single character. The correction teaches instead of just marking you wrong.
Type the answer
"repeat" — the vous form
You typed repetez
Almost, check the accents
répétez
Then you type it right, once. Producing the fix is what makes it stick. A slip never costs you the memory.
Evidence cards
Every choice is there to make words last, to make them stick and carry over to real use, rather than make the session feel easy in the moment.
The scheduler estimates when each word is about to slip and brings it back just before it does, so you do fewer reviews and remember more. In Advanced Mode it fits itself to your own memory patterns.
Producing beats recognizing. A character-level diff shows exactly what you missed, and the app knows the difference between a typo, a missed accent and a forgotten word, so a slip never costs a memory.
Context helps you understand a word, but retrieving it is what makes it stick. So Tongueforge makes you produce vocabulary inside cloze lines and example sentences, then weaves reading passages in so it resurfaces in the wild.
Production practice transfers to comprehension more reliably than the reverse. Tongueforge auto-generates reverse cards and tracks each direction on its own, surfacing the words you recognize but still can't say.
Blocked drills feel smooth because the pattern repeats; mixing forces you to discriminate. Tongueforge blends nearby conjugation targets and makes you identify the tense from context before producing the form.
Focused listening can retrain an adult ear to hear a new language. "Train your ear" plays a passage, asks a question, then reveals the text for read-along replay. Listening first, reading to consolidate.
As a card matures, Tongueforge moves it from recognition to cued recall to typed production to listening. Easy items stay fast; important ones become demanding at the stage where that extra effort pays off.
A generic red cross doesn't teach much. Tongueforge names the specific mismatch — "Almost, check the accents" or "Almost, mind the apostrophe" — then you type the correct form once. More like a tutor than a buzzer.
References
These studies established the learning science the method is built on. They weren't run on Tongueforge. No app can borrow their results as proof it works. We link them so you can check the reasoning yourself.
Practical outcome
The method tightens recall, surfaces the words you can't yet produce, and makes every review minute carry more weight. The rest of the app is built around that same constraint.