Flashcards for anything you need to know.
Spanish verbs, the periodic table, the Treaty of Versailles, your own revision notes — if it fits on a card, Flisk will drill it. Study it as classic recall or as multiple choice, and get one honest score per deck telling you how much of it you actually know.
Today's public library, which grows and changes. Decks you write yourself are private to your account.
Two ways to be tested. Same deck, same score.
Recall makes you produce the answer out of your own head; multiple choice makes you pick it out from plausible wrong ones. Every answer feeds the same mastery number either way. The card at the top of this page is the real thing — flip the switch above it and watch the same deck change mode.
Classic recall
21 decksRead the question, think, tap to reveal, then grade yourself honestly with Incorrect or Correct. The oldest trick in studying, and still the one that makes you do the work.
Multiple choice
22 decksTwo to five options, exactly one right. Your first tap is final — it locks, colours green or red, and flips to the explanation. Graded for you, no self-marking.
Rather dig it out of memory? A switch in the deck's menu studies any multiple-choice deck as classic recall, with your mastery and your place in the deck intact.
Bring your own subject. Borrow ours if it helps.
Every deck is either yours or public. Yours are private the moment you write them and stay that way; the public library is a shared shelf you can take decks from whenever you want one. Nothing about the app assumes a subject — a deck of irregular French verbs and a deck of Linux commands are the same object with different words in it.
Decks you write
private by defaultPaste a block of text into the create form and you have a deck. Notes from a lecture, a vocabulary list, the fifty facts standing between you and an exam — whatever you are learning this month, in your own words.
They never leave your account unless you decide otherwise, and there is no limit on how many you keep.
The public library
43 decks todayA browsable shelf of ready-made decks, grouped by subject and levelled from the basics up. Add one and it joins your study list; take it off and your progress waits for you.
Right now the shelf is stocked with what got built first — eight technical subjects, 2,433 cards, all hand-written. It is not the ceiling, it is the starting point: the library is meant to widen well past programming, and the app has never cared what a card is about.
Written something good enough to share? A way for people to put their own decks on the public shelf is being worked out — say hello and it will help shape it.
Three taps from a shelf to your study list.
This is the real flow, playing itself: open the library from the deck menu, expand a subject, add a deck. It lands on your study list marked "new", because you have not answered anything yet. Poke at it — the groups open, the buttons work.
my decks 2
study list 1
public decks you can add to your study list. removing one later keeps your stats.
playing — click anything to take over
Levelled series, not a heap
Subjects are broken into Level 1 → Level 8 decks, so you start where you actually are instead of scrolling through four hundred cards looking for the easy ones.
Your study list, everywhere
The list lives on the server, not the device, so the decks you picked on the laptop are already there on the phone. Your menu shows two sections — my decks and study list — and nothing else.
Removing is not deleting
Take a deck off your list and every statistic you built on it survives. Add it back months later and your mastery is exactly where you left it.
One honest number per deck.
No streaks, no badges, no confetti. Mastery is the share of the deck whose last answer from you was correct — get one wrong again and it drops. A deck you have not touched reads "new", because nothing has happened yet. And the number is yours alone: scores are kept against your account and shown to nobody else, not even on the public decks everyone studies.
Your menu, mid-week
Every answer counts the moment you give it, so the number moves while you study rather than at the end. Want a clean slate? Reset stats in the deck's menu wipes your history for that deck and it goes back to "new" — the deck itself stays put.
And it works with no signal
Cached decks, queued answers
Your decks are stored on the device and every answer is queued locally the moment you give it. Back on a network, the queue drains oldest-first and your mastery catches up.
Installable, and it survives a reload
A service worker keeps the whole app on your device, so reloading the page on the Underground still gives you your decks rather than a dinosaur.
Pause anywhere
Walk away mid-deck and Flisk holds your shuffled order, your position and every answer so far. Come back later and pick the deck up where it stopped.
A deck is just a block of text.
Paste one document into the create form. Q: starts a card, A:
answers it, and adding O: options turns the deck into multiple choice —
O*: marks the right one. Markdown works on both sides, so lists, bold and
code blocks all render. No import format to learn, no CSV to fight.
DeckName: Spanish Verbs
Q: How do you say "to eat"?
A: **comer** — a regular -er verb
Q: What is the yo form of **tener**?
A: **tengo** — irregular in the first personDeckName: Interwar Europe
Q: Which treaty formally ended the First World War?
O: The Treaty of Trianon
O*: The Treaty of Versailles
O: The Treaty of Rapallo
O: The Locarno Pact
A: Signed 28 June 1919. Trianon settled Hungary;
Rapallo was Germany and Russia; Locarno came later.
// One O*: per card, 2–5 options. A: becomes the
// explanation shown after you answer — and it's
// optional; leave it out and Flisk shows the
// correct option instead.Pick a subject. Find out what you know.
No ads, no upsell, no streak nagging you at nine in the evening. Just cards, an honest score, and a library that works on the train.
New signups are paused for now. Already have an account? Everything works as usual.