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Early access · iPhone first · TestFlight
Flashcards that know when you're about to forget.
Snap a sign, say a word, paste a line — Tomodekki builds the card and brings it back on the day you'd have lost it. Not a day sooner, not a week too late.
One email when your invite is ready. Nothing else, ever.
Due now
約束
a promise; an appointment
駅
で
友達
と
待ち合わせ
“Meeting a friend at the station.” Furigana, pitch accent and audio on every word — in reviews, in reading mode, everywhere.
It's still just flashcards. That's the point.
Nothing here is exotic — a word on the front, what it means on the back, four honest buttons. What's changed is fifty years of research into when the card should come back.
Testing, not reading
Recalling a word beats reviewing it
Students who studied a passage and then practised recalling it remembered 61% of it a week later. Students who reread the same passage the same number of times remembered 40% — while feeling more confident they'd remember it.
Roediger & Karpicke, “Test-Enhanced Learning”, Psychological Science 17(3), 2006
Spacing, not cramming
Longer gaps, half the sessions
Over nine years, learners drilled 300 foreign-language word pairs on different schedules. Thirteen sessions spaced 56 days apart matched twenty-six sessions spaced 14 days apart — the same recall years later, for half the work.
Bahrick, Bahrick, Bahrick & Bahrick, “Maintenance of Foreign Language Vocabulary and the Spacing Effect”, Psychological Science 4(5), 1993
A modern scheduler
Finding your gaps, not the average one
Tomodekki schedules with FSRS, which fits a memory model to your own answers. Benchmarked against roughly 350 million real reviews across about 10,000 collections, it predicts recall better than the classic SM-2 algorithm for the overwhelming majority of them.
Open Spaced Repetition benchmark, 2024–2026. FSRS has been Anki's default scheduler since v23.10.
The curriculum is whatever you walked past today.
Every other app makes you stop, open it, find “add card” and type. Tomodekki takes the input where you are and builds the rest while you get on with your day.
Say it
Heard a word you didn't catch? Say it out loud. Tomo works out what you meant, spelling and all.
Snap it
A menu, a sign, a page of manga. Point the camera and pick the words worth keeping.
Send it
Share a subtitle, a message, a line from anywhere on your phone. It lands as a card.
Questions you're about to ask
When can I actually use it?
Early access runs on TestFlight, in batches, starting with the people on this list. The App Store release follows once the first cohort has been through it.
Is it iPhone only?
For early access, yes — TestFlight is an Apple thing. An Android version is in development; leave your email and pick Android and you'll hear when it opens.
Do I need to know any Japanese to start?
None at all. The first pack is the kana, taught from zero, and a short placement check puts you at the right rung if you're further along.
What happens to my email address?
It goes in our own database, it's used to send you an invite, and that's it. No list-selling, no newsletter you didn't ask for. Reply to any message and we'll delete it.
Tomo is looking for a first cohort.
A few hundred testers, from “I know three kana” to “I'm halfway through a novel”. Beginners especially — that's the part that's hardest to get right.