AUSTIN, TX — The iPhone just got sexier.A new app for the world’s most drooled over cellular gadget scores owners on their prowess in bed. Developed by a computer science student at the University of Texas, “Passion” rates sexual activity based on duration, activity level and orgasm, then grants scores from “bad” to “perfect.”

To use the app, iPhone owners simply start the program, strap their phone to their arm, and then lose themselves in the moment. While they’re busy, the phone gauges duration using the gadget’s timer, activity through the phone’s accelerometer sensors, and orgasm via the microphone. A quick tap to stop the program afterward, and the passion rating pops onto the screen.

“This application uses all of the iPhone’s features to measure how passionate you can be with your loved one,” developer Chris Alvares told Metro.co.uk. “Just put your iPhone in your pocket or an armband and start Passion. After you are finished, it will calculate a score between zero and 10.”

Whether or not the score is a keeper, users may upload theirs online for comparison with other similarly equipped Lotharios.

“Passion” sells for $4.99 in Apple’s iTunes App Store.

Alvares also developed the iPhone applications “Music App,” “Four Squared” and “WikiQuiz.”