the new app Spreadsheets heats things up by giving users a tool to apply Quantified Self principles between the sheets. Created by Danny Wax and Tyler Elick, the co-founders of Ardenturous Labs, Spreadsheets uses an accelerometer and analysis of coital sounds to track the data of your sex life. Having first set its calibrations based on the type of mattress you own (inner spring? memory foam?), it measures the duration, number of thrusts (if applicable), and loudness of sex. But Wax and Elick, who met through a mutual friend at the University of Denver and started developing the app in March of this year, are quick to clarify that they’re not trying to tell people how or how often to have sex.