The Apple Watch is lots of things to lots of people – chic, attention-grabbing, fun – but at its core, it is basically a sophisticated computer worn on the wrist. Like any computer, it is only as good as the software that it runs. Apple is well aware of this, and has promoted apps which exploit the intimate proximity of the little device to its owner’s body, many of which involve personal wellness.

The familiar low-hanging fruit in the wellness world includes pedometers, calorie and weight loggers, heart rate monitors and sleep-quality trackers. Start-up CH4 is about to take personal monitoring to the next level with a smart-phone-linked device that records your methane emissions, AKA farts. The average person farts 14 times per day; we are talking “big data” here.

CH4 creator Rodrigo Narcisco boasts that his device will enable the wearer to identify foods that are safe for offices, road trips, and first dates. How consumers will feel about sharing all their personal emissions data with the NSA is yet to be determined.