JA Sensei version 3.5.2 is available on Google Play with many new features and contents in the Lesson and Kanji modules:

Lessons

• New Quiz system at the end of each lesson (more than 600 possible questions!)
• 6 new complete lessons for Premium users
• Audio recordings for pronunciation lesson (lesson 2) available for Premium and Free users
• 24 new exercices added for Premium users (+24 free)
• JA Sensei now remembers your last position in the lessons (last viewed page for tablets and last viewed lesson for phones)

Kanji

• Items are colored according to your quiz performance
• Items in the learning section are ordered and separated by stroke count
• In the Kanji Search Tool, add quickly all results to a personal list + increased results from 200 Kanji to 500 Kanji + truncated characters fixed

More

• Daily stat tracking computation for quizzes much faster
• Multiple minor bugs fixed

JA Sensei is available on Google play, also have a look at JA Audiobook if you haven't yet.

UPDATE 3.5.2 : I've uploaded a version that fixes a couple of issues. Galaxy Tab 2 devices would crash when trying to take the quizzes at the end of each lesson. Besides, Kanji, Voc and Kana list sometimes didn't display all the items of the list depending on the skill you had selected. And if you have the Premium version and the new lessons don't show, simply reinstall the Lesson module.