Semper - Learn Vocabulary

Contains adsIn-app purchases
15.1K reviews
Content rating
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About this app

For Questions about the Status Quo of Semper, please check out our forum at!forum/semper

Learn a language without spending hours and hours studying vocabulary. Semper takes care of memorizing. Made by people who love learning but hate studying, Semper is the most efficient way of learning words, phrases or facts.


Semper provides short microlearning puzzles of about 3-5 seconds each, distributed throughout your day.
Semper uses natural breaks in your flow, like when you unlock your phone or while you wait for an app to load. This makes it comfortable, while relieving you of having to schedule time for memorizing vocabulary. Semper uses an adaptive algorithm, that optimizes item repetition and puzzle difficulty to maximize learning efficiency for each user.


Semper offers more than 50,000 packs for over 50 languages.
Learn English, French, German, Italian, Spanish, Portuguese, Mandarin, Swedish, Arabic, Norwegian, Dutch, Finnish, Russian or Danish words, phrases or expressions with a Semper language pack. Train mental arithmetic with the Semper packs Addition, Subtraction, Multiplication or Division. Choose from a wide variety of user-generated packs teaching even more languages. Memorize trivia knowledge, learn grammar or find a pack matching your course or textbook.


In the free version, you can do unlimited practice modes. To keep solving puzzle when activating your lock screen or before apps load and maximize your learning, we offer a premium version after the trial phase.


The University of Potsdam proved that Semper’s microlearning method is much more efficient than conventional learning methods ( Research shows that the most efficient way to learn is with small units spread out over the day. Whether you’re learning a new language, improving your math skills or honing your knowledge, Semper’s microlearning method is guaranteed to help reach your learning goals.

Semper now has an open beta — Always get the newest features, let us know what you think, or if you find any bugs. Get it at


Semper was previously known as UnlockYourBrain
Updated on
Jul 14, 2017

Data safety

Developers can show information here about how their app collects and uses your data. Learn more about data safety
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15.1K reviews
A Google user
October 8, 2019
Could be a stellar vocab study app. But monetization requirements ruined the ride. Great UI and algorithms. However, bugs that are not going to get fixed anymore mean you have to get used to workarounds, which is still worth it. Things to remember: - editing packs doesn't work in app. Upsync is broken. -MANAGE YOUR PACKS ON THE QUIZLET WEBSITE (EASIER DATA ENTRY) AND DOWNSYNC TO APP - DELETE a pack in-app to downsync changes done to it online on next app start (you'll lose study progress).
16 people found this review helpful
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A Google user
January 26, 2020
After logging in via quizlet, theres this girl telling you to add a flashcard set. After having to search for mine (cant even show your own sets, have to browse) I can only study these sets. There is no options or a menu. This guided tutorial is not working as intended, because you can only press the pink "+" in the beginning and theres no way to finish the tutorial. It is inacceptable/unprofessional to have such mistakes after releasing an app.
19 people found this review helpful
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Tabitha Devlin
February 12, 2022
It just doesn't work (on my phone anyway). I don't get any puzzles when loading apps or when unlocking my phone and I'm pretty sure it's not user error. If it is me, then that's because they don't have clear enough instructions on how to set up these functions.
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What's new

Semper is now free for all and major bugs are removed

- App contains no more ads or payment walls.
- "Silly answers" bug is fixed. Please reinstall your packs, if they are affected
- Search has been simplified
- Pack created by the pack created now support "listen" and "type-in" functionality
Please share your feedback through the forum