Aniplex released today in Japan the next Madoka smartphone game the Puella Magi Madoka Magica Side Story: Magia Record on iOS and Android. Aniplex planned to release it in the mid-July but because of the development delay the could release it only today.
You can download it for FREE but it is available only in Japan and in Japanese. The first campaign already started where you can get swimsuit version Iroha and you can get several magical stones. By the way if you login between August 25 and 28, 2017 into the game you will get even more stones