The same SM-2 algorithm, the same four grades, the same ruthless scheduling that made spaced repetition work. What’s gone is the part where you spend Saturday building the deck — Language Flash generates cards in your target language and drops them straight into the queue.
250 cards free, no card required. Premium unlocks the unlimited deck and the AI drills.
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Ease factor starts at 2.50 and moves with every answer. Again drops it 0.20, Hard 0.15, Easy lifts it 0.15, floored at 1.30. Intervals compound off it exactly as they should.
Again / Hard / Good / Easy — with the resulting interval printed on each button before you commit, so you always know what a press costs you.
Space flips, 1 through 4 grade, U undoes. Your hands never leave the keyboard, and a hundred-card queue goes down in one sitting.
Every card you meet anywhere in the app lands in the same SM-2 queue. Nothing is a separate silo, and nothing needs formatting.
A swipe deck of generated vocabulary and phrases on any theme you name. Swipe right and the word enters your review queue due immediately.
The heart of it. Due cards, sorted most-overdue first, graded with four keys. Learning cards come back in ten minutes; mature ones vanish for months.
Pick a verb and a set of tenses, get five fill-in-the-blank sentences, and have every answer marked — including the near-misses where only an accent is wrong.
Eight multiple-choice questions pitched at a CEFR level from A1 to C2, with an explanation of the rule behind every answer you missed.
Write freely in your target language and get corrections, an improved version, and a note on what you already did well.
Point a camera at your kitchen. Every object comes back named in your target language, ready to save as cards.
We are not pretending Anki is bad. It is the best in the world at what it does. It is also a lot of work before your first review.
| Language Flash | Anki + a shared deck | |
|---|---|---|
| SM-2 scheduling | Yes, identical maths | Yes |
| Time to first review | About thirty seconds | An afternoon of setup |
| Where cards come from | Generated for your language and level | You write them, or inherit someone else’s |
| Conjugation practice | Marked sentence drills, 9 languages | A separate deck, unmarked |
| Writing feedback | Corrections on your own sentences | Not a thing decks can do |
| Add-ons and theming | No | Endless |
| Deck sharing | Not yet | Its greatest strength |
Switch target language whenever you like — each one keeps its own deck and its own review history.
The mechanism, not the motivation.
Spaced repetition schedules reviews at widening intervals, just before you would forget. Here is the mechanism, the evidence behind it, and how to run it without burning out.
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SM-2 is the scheduling algorithm behind Anki and most spaced repetition apps. Here is exactly how ease factors and intervals are calculated, with the real constants.
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Frequency data gives a clear answer: a few thousand words carries ordinary conversation. Here is what each vocabulary milestone unlocks, and how long it takes.
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