Wonder if you're good in bed? Yeah, there's an app for that.
Spreadsheets is a new app that monitors your performance in bed.
How does it do this? Well, according to the web site it tracks a user's "movement and audio levels through the accelerometer and microphone to provide statistical and visual analysis of their performance in bed."
So, yeah, it bases your performance on how loud you are and how much you move. (Huffington Post)