01 / 04 — Offline
OFFLINE.
No signal required
Cards don’t need a signal. Study on the plane, on the train, in a queue — reviews sync when you’re back.
spaced repetition, done right
Review less. Remember more.
Spaced repetition that schedules every card for the moment you’re about to forget it.
01
Create a list
Ask AI, import the CSV, shape the card — then start studying.
02
Spaced repetition
FSRS-6 schedules every card for the moment you’re about to forget it.
03
Four-grade study
Again, hard, good, easy — the gap grows with every answer.
04
Card builder
A layout canvas that decides how every card renders in study.
05
Deck library
Ready-made decks — grab one and the algorithm takes over.
06
Tailored for you
Offline, dark mode, share links, and streaks — shaped around how you study.
don’t study more. study when it matters.
Create a list.Start studying.
Import the CSV.
Drop in the CSV and flshcrds maps it into a list of cards, ready to study.
Step-by-step guide →You can also import decks from Anki, or create individual cards in the app.
Tailored foryou.
02 / 04 — Dark & light
DARK.
Easy on the eyes
Studying at night? Switch to dark theme so late reviews don’t strain your eyes.
Drag to compare light and dark themes
03 / 04 — Share a deck
SHARE.
Pass it on
Cramming for an exam? Share your materials with friends — one link, and the deck is in their library.
04 / 04 — Card builderCARD
CARD
BUILDER.
Shape how you learn
Set the card template: name the fields, decide what goes on the front and what on the back, and how each field looks. Every card in the deck is built from that template.
The algorithm knowswhen you'll forget.
Recall falls on a curve.
From the second you learn a card, your chance of recalling it drifts down — steep at first, flatter with age. That is the orange line falling.
Your target is the tripwire.
You choose the retention target — 90% by default. FSRS books the next review for the exact moment recall touches that line — late enough to be worth it, early enough to still be there.
Every pass stretches the gap.
A successful review resets recall to 100% and makes the memory more stable — so the gaps grow: 1 h → 4 h → 1 d → 4 d. Skipping one drops you onto a dashed curve.
The same card, reviewed across growing gaps — 1h, 4h, 1d, 4d — drawn with the same FSRS-6 forgetting curve the app schedules with. Every dashed line runs to the edge: the retention you would be left with had that review never happened.