Nihongo Lessons

I recently came from Jalup and started using this app. I am very impressed - the interface is simple and intuitive, and the spaced repetition system works much better to prevent getting overwhelmed with reviews as you get deeper into the sentence packs. The developer, Chris, was super helpful in answering some questions I had about importing my Jalup progress and getting me switched over from the legacy app. I am currently using this Lessons app for kana and sentence packs in combination with Nihongo Pro for Kanji / Vocab. Great combo, and it helps that the card interface is the same with the simple swipe gestures in both apps. I highly recommend you give these apps a trial run to see if they suit your learning style and goals!