I love it BUT...

First of all it IS the best Japanese app out of the dozens Ive tried. My only concern is that I paid for a six months subscription because Mirai promised to post a new chapter every month, and at first they did.
That was a year ago. Since then, nothing. No new lessons and radio silence. So my advice is, start with a one-month subscription, zip-line through the quizzes since theyre mandatory for downloading the next chapter and so on (youll come back later to study them in depth), and wait for Mirai to keep their end of the bargain. Once you commit, you cannot cancel mid-subscription if they dont. This is the only reason I dont give it five stars.

だあまぺえる about Mirai Japanese, v7.4.2