Karl Kroll
Really fun and quite useful too. Basically the only app of its kind in the Playstore. Though I do have some suggestions. First, some kind of undo button for when you mess up or have a better Idea. Second, being able to change the MP without the magic circle reseting. Third, some kind of "map sizes" for the magic circles. It sometimes gets a bit cramped on my phone screen when im trying to make more complicated ones. Overall I'd say it's already awesome but does still have a lot more potential.