Puella Magi Madoka Magica Online

It wasn't a smartphone game, but a Flash browser game. It came out before Magireco. There were quite a few games back then, but this was the first one I ever spent money on. I really wanted Wedding Sayaka... Slightly before the service end announcement, quests with unusually low stamina requirements started appearing, and I thought it was going off track, then they announced the service end. I preferred poking characters on the home screen and making them fall off rather than the game itself.