JA Sensei version 5.1.7 is online on Google Play with a redesigned Phrasebook module. All phrases can now be broken down to get a detailed list of words, grammar forms, and particles used. If you have a hard time understanding a sentence, you'll have all the explanation now.

The quiz also now tracks two skills: your oral expression and your listening comprehension. Learn new sentences in various situations of everyday's life, and you'll quickly improve your communication skills. That's especially appropriate if you plan to visit Japan and don't have much time to learn every aspect of the language. JA Sensei will then automatically manage your reviewing sessions.