PipeRoll is a puzzle app that is currently number one on the iTunes free apps charts. Connect water pipes and sewage pipes between buildings by tapping your screen to turn the pipe counterclockwise until it joins with it’s neighboring pipe. Make sure your pipe connects matching drain colors. For example, blue drains (probably represent water) should connect to blue drains. You don’t always have to use all of the pipe provided, you just need to each pipe from point A to point B.
There were a few instances where I didn’t think that I actually came up with the solution to a level, but the game would suddenly notify me that I completed it by jumping to the “Well done!” screen and prompt me to continue.
For a free game, PipeRoll is a great diversion, and what’s even better is that I haven’t encountered any advertising on it except for the promo at the bottom of the “continue” screen for PipeRoll 2 Ages HD (which is getting great reviews on iTunes).
I found something called PipeRoll on Google Play, with similar screenshots and the same icon, however the developer isn’t Navigation-Info so I’m not sure if it’s the same app.