I've released JA Sensei 2.7.2. Please update it from Google Play. Here are the new features:

• Lessons: vocabulary list with comments added for each lesson
• Lessons: exercise page added to practice what you learned
• Verbs: manage your personal lists
• Verbs: more English and French meanings added + group info added (ichidan/godan)
• General: audio files might get scanned by audio players FIXED
• Grammar: 14 new detailed documents
• Remember to check the speech recognition system, too!