Great app. . . But the ads!?!? – Swift Math - Freaking Hard Problem Solving Brain Game Review

The ads pop up during game play and there have been some inappropriate ads that have come up. Come on kids are playing this game. Proved an ability to pay one time to get rid of the ads. Otherwise this could be a solid 4-5 app.
Review by Moutai on Swift Math - Freaking Hard Problem Solving Brain Game.