Built on how memory actually works
Vocabry isn't a word list with a timer. Every part of it, the algorithm, the images, the grading, is chosen because of what the research says makes a word stick.
Spaced repetition, tuned to you
Every card ends with a self-grade: Again, Hard, Good or Easy. Vocabry runs those grades through an SM-2 style spaced-repetition schedule: a word you mark Again comes back in minutes, one you mark Easy gets pushed out days or weeks. The interval compounds every time you get it right, so review time goes to the words that actually need it instead of ones you've already learned.
This is the same principle behind the forgetting curve research from Ebbinghaus onward: recall right before you'd otherwise forget is what moves a word from short-term to long-term memory.
Dashed = the word fading from memory. Solid jump = you review it right before it's gone, resetting it stronger and further out each time.
One image, every word
Every flashcard we add carries a picture alongside the word, its meaning and an example sentence from the textbook. That's dual coding at work: pairing a verbal label with a visual image gives the brain two independent retrieval paths instead of one, so if the word slips your mind, the picture can pull it back, and vice versa.
It also plays to the picture superiority effect: concrete images are recalled faster and more reliably than text alone, especially early in learning a language when a word still has no other mental anchor.
Four mechanisms, one goal: recall
Each part of the app maps to a specific cognitive-science mechanism, not a design trend.
Active recall
Grading yourself forces retrieval before the answer shows, the testing effect, which builds a stronger memory trace than re-reading ever does.
Dual coding
Image + word + sentence encode the same word three ways, so one weak link doesn't lose the whole memory.
Spaced consolidation
Reviews land right as a word starts to fade, moving it from working memory into long-term storage instead of just refreshing it.
Interleaving
Daily batches mix new and struggling words from different lessons, which research shows beats drilling one list start to finish.
Tested with real learners, not in a lab
Vocabry's first pilot ran with 10 Dutch learners in a single A1 class at a private language institute, using their own textbook mapped into the app. Students took a baseline vocabulary quiz on day one, used the daily 30-word batch alongside their normal lessons for four weeks, then sat the same quiz again, plus a surprise retest a week later with no extra studying, to check what actually stuck rather than what was freshly crammed. It confirmed the design principle behind Vocabry: self-study has to mirror the syllabus exactly, since the app never introduces a word before the teacher has taught it in class.
Frequently asked questions
What is spaced repetition?+
Spaced repetition is a review schedule that shows you a word right before you would otherwise forget it. Each successful recall pushes the next review further out, so study time concentrates on words that are actually at risk.
How is Vocabry different from Duolingo or Anki?+
Duolingo teaches its own curriculum on its own schedule. Anki requires learners to build their own decks. Vocabry maps an institute's existing textbook into ready-made lessons, so students study exactly what their teacher assigned.
Does spaced repetition work for grammar as well as vocabulary?+
Partly. Vocabry uses spaced repetition for vocabulary and treats irregular grammar, such as Dutch strong verbs, as a separate drill category, because irregular forms have to be memorised rather than derived.