The app is called Phroller. It's an app that let's users roll virtual dice on their phones. Mostly for tabletop gaming.
I'm trying to make it as delightful as possible. The whole catch phrase i'm going with is "Nothing beats real dice. I'm making Phroller the next best thing"
It features extensive customization options and I'm aiming to feature artists of vastly different styles in premade dice trays that users can download.
If anyone is looking for a different way to measure that doesn't involve aiming at edges and corners, I just released Phruler! An app that measures how much your phone moves :D Phruler.com