How Spaced Repetition Works
You forget most new words within days of learning them. Spaced repetition beats this forgetting curve by spreading reviews over days, weeks and months instead of cramming them into one sitting.
Each successful review makes the memory last longer, so the intervals keep growing. Vocabuo handles the scheduling automatically. You can also set the repetition intervals yourself.
Review at the Perfect Moment
In the 19th century, psychologist Hermann Ebbinghaus discovered a brutal pattern: without review, you lose roughly 50% of new information within the first hour, and by the next day you are lucky to remember 30%. This is the forgetting curve, and it is the reason the word you learned this morning is already gone. He also found the cure. If you review a word at the exact moment your memory starts to dip, the curve flattens and the memory lasts longer. Vocabuo schedules every flashcard around this principle, so each review lands right before the word would vanish.
An Algorithm That Adapts to You
Vocabuo tracks your performance on every single word. Words you struggle with appear more often, while the ones you have mastered get pushed weeks into the future. Every minute you spend studying goes to the vocabulary that actually needs work.
No Boxes, No Spreadsheets
If spaced repetition is so effective, why doesn't everyone use it? Because scheduling a thousand words by hand is a mathematical nightmare: which words are due today, which in four days, which are mastered. Learners used to manage this with the Leitner system, a physical box of flashcards and dividers. Vocabuo does all of that math for you, so all you have to do is open the app and review.
Active Recall Built In
Repeating a word ten times in a row feels productive, but your brain stops paying attention after the third time. It is a fluency illusion: the word sits in short-term memory and evaporates within days. What actually builds memory is effort. When a little forgetting happens between reviews, your brain has to work to retrieve the word, and that struggle is what psychologists call the spacing effect. Vocabuo is built around this: type the answer, pronounce it out loud, or tap to reveal. Ten minutes of spaced reviews every day beats an hour of cramming once a week.
Features
100,000+ Downloads ❤️
4.7 average rating from 1,327 App Store and Google Play ratings.
Ease of use is smooth. Includes C2 level vocabulary which is rare. Highly recommend.
František
Definitely worth the subscription. Looks great. Easy to use. Neat integration with built-in e-reader, text analyser, browser, YouTube viewer and AI tutor, so analysing content and creating flash cards is easy. System for flagging words you already know works well so it’s ideal for intermediate learners as well as beginners. Option to type or speak answers makes sure you really know a word. Spotted issues with a couple of sample sentences but they’re easy to report. Some format problems with text analyser but it’s actively under development. Still worth five stars
majid
I've been passionately learning different languages for over 10 years. Spaced repetition suits me very well, and therefore computer-assisted learning works perfectly for me. I've tried at least 10-15 different apps and programs. This app is the first one I really like for my smartphone. It's actually very simple, but all the others are more like gimmicks. Thanks to the developer!
Malte
Exactly what I was looking for, with features I wouldn't have even thought of. Awesome app, great aesthetic and swiping makes it fun 10/10
Owen
I'm using it for German and it's perfect! I'm using the free version and I have no problem, the premium features are extra things that you can buy if you want, but if you can't pay them now you'll still be able to learn the flashcards! It doesn't make it useless for people who don't pay and have lots of great additional features for those who pay! Very useful and fun, congratulations to the developers and hope they add more languages in the future😊👏🏻👏🏻💐
Lucía
This is an excellent app if you are familiar with the language already, this app is not for beginners, since this app is a vocab trainer and not an all around language course, so if you are looking to expand your vocab, I really recommend this app!
language arts
I found, for the first time in my life, an app that I really like. I’m already 27 years old.
Vongo
I really like this style of learning. It's a very easy to use application. Very usable even on the free tier. The app uses AI extensively, but I don't think this is a bad use of it.
Jakub
I've been using this app to extend my Spanish vocabulary and it's really enjoyable. I like the AI generated explanations and how is it easy to add new words you want to practice. Including the ones that appear in examples sententes you find while studying other words.
Bálint
I have only been using this app for a couple of weeks, but the combination of flash cards which are great for recalling vocabulary and the fact that you can add YouTube videos and pull useful from that, as well as a number of other features, makes it one of the best on the market for me.
Psilvquinn
I can see my progress every day, love how it adapts to what I forget. Finally a language app that gets me.
G.eis
Great little app clearly built with an ai first approach which many incumbents don't have. Can get translations on the fly and build up my vocab in a structured and unstructured way by adding words I encounter in my life as I go. Top stuff. Would like to see a wider variety of generated sentences when learning a word so I can see it in slightly different contexts. Additionally, when asking for the llm description of the word I'd like to have it compared to other synonyms in example sentences. So you can get the real context of when one word is used over another.
Shiesb
So I know you're not supposed to judge a book by its cover, but I'll admit that what drew me to this app and it's keeping me there is that I like looking at it. It has a retro but modern aesthetic that I really like. And I'm focusing on that aspect for this review because there are many apps that perform the same function -- flashcards to learn vocab. So for me, what makes this one stand out is that I like looking at it haha
Sonjabean
Finally a well developed app that uses spaced repetition system and simple flashcards to help you extending your vocabulary while you are learning a language. Great UX and you also have AI chat to practice with.
Lysla4
I really love using Vocabulary Flashcards Vocabuo. It’s a fantastic app for building vocabulary with flashcards and AI assistance. The interface is clean and easy to use, and it has helped me improve my vocabulary efficiently. Highly recommended
Sezarm7
This app has a great potential. It has built-in features such as audio, image for each vocabulary. The audio sounds much better than those AI sound in Anki app. It had all the good features for language learning such as repetitions. The extra features such as loading YouTube videos’ subtitles are not very useful at the moment since I always encounter loading errors. The web page reading is a bit clumsy to me too. Overall, this app is the best app to learn vocabulary (compared with all kinds of apps I’ve tried so far). I especially love the interface, which is very neat and easy to follow. I hope they can improve the import part (for YouTube and foreign websites) since this is where you can learn the most authentic languages!
Nicoletta_French
Unlike our competitors, we don't generate fake reviews with AI. 😉