Very useful during onsite verification that requires immediate pipe sizing
I've used these guys' software on other mobile OS's, and all their programs are awesome. If you are an engineer, these apps are a must have!
Update for compatibility with OS 5 & 6 devices
Fix the pipes & connect them to make the water flow in this plumbing puzzle game
Used by over 100000 piping professionals, see how useful it can be for you.