Can I import a vocabulary list from a spreadsheet?

Yes. Copy the word and meaning columns and paste them into "Add many at once"; each line becomes one card. You can also import a two-column CSV file.

When do missed cards come back?

A missed card comes back before the session ends and is due again the next day. Each time you know it, the gap grows, up to 15 days.

For a small deck, "Make a share link" creates a link that contains the cards but not your progress. For a larger deck, send a CSV or JSON file.

Yes. Turn on "Swap sides (see the back, answer the front)". In "Type the answer" mode your typed answer is checked.

Make two-sided cards and flip through them; the ones you miss come back more often

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Make two-sided flashcards and flip through them to memorize words, definitions or facts. Cards you miss come back more often.

On the "Cards" tab, type the front and back and press "Add card". To add many at once, use "Add many at once" on the "Import and export" tab.
On the "Study" tab, choose a "Mode" and which "Cards" to see ("Due today" or "All"), then press "Start studying".
Tap the card or press Space to flip it, then press "Knew it" (→) or "Missed it" (←). On a phone, swipe the card left or right.
Check your progress under "Cards per box" and press "Back up all decks (JSON)" now and then.

The tool uses five Leitner boxes. "Knew it" moves a card up one box, and it returns after 1, 2, 4, 7 or 15 days. "Missed it" sends it back to box 1, and it returns tomorrow and later in the same session.
For bulk adding, write one card per line as "front TAB back" or "front, back", or paste two spreadsheet columns.
Multiple choice options come from other cards in the same deck, so it needs at least 2 cards. "Read cards aloud" uses the browser's speech feature.
Cards and progress are saved only in this browser on this device. Clearing browser data deletes them.

Can I import a vocabulary list from a spreadsheet?: Yes. Copy the word and meaning columns and paste them into "Add many at once"; each line becomes one card. You can also import a two-column CSV file.
When do missed cards come back?: A missed card comes back before the session ends and is due again the next day. Each time you know it, the gap grows, up to 15 days.
Can I share a deck with a classmate?: For a small deck, "Make a share link" creates a link that contains the cards but not your progress. For a larger deck, send a CSV or JSON file.
Can I see the meaning and answer with the word?: Yes. Turn on "Swap sides (see the back, answer the front)". In "Type the answer" mode your typed answer is checked.