Features
Games
MemDecks has ten games as of 2 September 2026: one lesson game that teaches new words, six single-player games that rehearse the cards you already own, and three multiplayer games. Every game is built from your own collection — none of them ship their own word list — and each declares how many cards it needs and which study languages it supports.
Every MemDecks game
| Game | Kind | What you do | Cards needed | Study languages |
|---|---|---|---|---|
| Phrase Builder | Lesson | Learn five new words inside one spoken phrase | No minimum | Armenian, Greek, Russian, Japanese, Chinese, Spanish, German, French and Italian |
| WordBase Quiz | Solo | Pick the card that matches the prompt | 10 cards | All |
| Word Type | Solo | Rebuild the word letter by letter from a mixed pool | 10 cards | All |
| Word Mahjong | Solo | Clear matching word and translation tiles | 8 cards, board capped at 19 | All |
| Canon Potato | Solo | Shoot the correct word under time pressure | 4 cards | All |
| Skyword | Solo | Leap from the prompt cloud to the matching translation | 3 cards | All |
| Alphabet Quest | Solo | Read text that shifts from English into the target script | No minimum | Armenian, Greek and Russian |
| Words Tetris | Multiplayer, 1–4 | Stack falling cards and clear lines by matching translations | No minimum | All |
| Lexi Spy | Multiplayer, 2 | Bluff and deduction built from your vocabulary | No minimum | All |
| Mirror Decks | Multiplayer, 2 | Cover your opponent's cards in a translation duel | No minimum | All |
A game you cannot yet fill does not disappear — MemDecks shows what it needs and how many cards you are short.
How a game gets its cards
Games do not carry vocabulary. When you launch one, MemDecks reads its declared requirements — a minimum card count, sometimes a maximum, occasionally a specific deck or topic pack — selects qualifying cards from your collection, and hands them over along with a short-lived session token.
This is why the same game feels different for two learners, and different for the same learner a month later. The difficulty of Word Type is the difficulty of your words.
How games move card progress
Each game decides what an answer is worth and reports a score change per card. MemDecks adds it and clamps the result to the card's card HP. Two examples, as of 2 September 2026: WordBase Quiz gives 3 points for a correct first pick and subtracts 1 for each wrong pick in that round; Word Type gives you the number of letters you never had to reveal, reduced if you took the flip or audio hint.
Because the games disagree about what an answer is worth, a percentage tells you how much practice a card has had, not which kind. See card progress.
Games from independent developers
MemDecks games are separate applications loaded inside a frame, and some are built by independent developers rather than by MemDecks. A game receives your cards and a session token; it never receives your password, your email address, or cards in a study language other than the one you are using.
The third-party game policy states what MemDecks is and is not responsible for, and how to report a game.
Why a game might not be listed
Three reasons, all of them stated in the app rather than silent: your collection is below the game's minimum card count; the game declares a study-language list and yours is not on it (Alphabet Quest supports Armenian, Greek and Russian; Phrase Builder supports nine languages); or the game is temporarily unavailable.