The Method · the honest scheduler

Back while you still know it.

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.

Recall · the fade FSRS-6 · scheduler
100 75 50 25 0 % RECALL 0 3 6 9 12 15 18 DAYS SINCE LAST SEEN →

Drag the handle · or focus it and use ← →

Day 1recall ~90%

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.

An interactive forgetting-curve instrument. Recall starts at 100% on the day you last saw a word and fades over the following days. Tongueforge brings each word back early, around 90% recall (marked in green), while you still know it, so reviews almost never fail. The low end of the curve is the forgetting it prevents.

What it comes down to

Three ideas do the work.

Retrieve, don't recognize

The review format leans toward producing the answer, because that's where false confidence breaks.

Context beats fragments

Words, tenses and grammar live inside sentences, so your memory has something to hold on to.

Feedback should teach

Miss a word and the app points at the exact form you got wrong, not just a red X.

A review in motion

You type. It corrects. You remember.

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

Why the review engine feels sharper.

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.

01 · Scheduler Ye, Su & Cao, 2022

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.

Type the answer, don't tap it

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.

Keep vocabulary inside real sentences

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.

04 · Production Hopman & MacDonald, 2018

Train both directions independently

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.

05 · Interleaving Nakata & Suzuki, 2019

Mix similar tenses on purpose

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.

Listen before you peek

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.

07 · Escalation Bjork & Bjork, 2011

Let cards earn more difficulty

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.

08 · Feedback Lyster & Ranta, 1997

Explain the exact mistake

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.

Practical outcome

Practice that feels crisp, not noisy.

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.