Semper is an Android application developed by UnlockYourBrain that makes learning new vocabulary words, phrases, and facts a breeze. It provides microlearning puzzles of around 3-5 seconds each, which are distributed throughout the day, utilizing natural breaks in your flow, such as unlocking your phone or waiting for an app to load. This makes it comfortable and convenient to memorize vocabulary without having to schedule time for it. Semper features an adaptive algorithm that optimizes item repetition and puzzle difficulty to maximize learning efficiency for each user. The app offers more than 50,000 packs for over 50 languages, including English, French, German, Italian, Spanish, Portuguese, Mandarin, Swedish, Arabic, Norwegian, Dutch, Finnish, Russian, and Danish words, phrases, or expressions. It also offers packs for mental arithmetic, trivia knowledge, grammar, and more. Semper's microlearning method has been scientifically validated by the University of Potsdam, which has proven it to be much more efficient than conventional learning methods.