Circle Stop is a one button game that is free with zero in app purchases or advertisements.
Ranked in these QuestionsQuestion Ranking
Pro Very simple game mechanic
Circle Stop has a very simple one touch game mechanic in that all the player needs to do is tap the screen when one circle rotating on the screen coincides in placement with a target circle.
Pro Somewhat metatative
Circle Stop is best played when on wants to relax.
Con Not a lot of content
Circle Stop has just the one game mode, no unlockables, no achievements.