This looks promising, a low-energy Bluetooth 4.0 Tire Pressure Monitoring System (TPMS) that works with an iOS or Android smartphone, monitors tire pressure continuously and send alerts.
Product Description: FOBO Bike works directly with your smartphone to provide the cool features that comes with FOBO Tire. FOBO BIke is designed to cater for two wheel vehicles (motorcycles and bicycles) with tire pressure below 600kPa(87psi). FOBO Bike is the world’s first all Bluetooth Smart advanced Tire Pressure Monitoring System (TPMS) for two wheelers and three wheelers. FOBO Bike uses the latest Bluetooth 4.0 that works directly with your Android and iOS device. The main function of FOBO Bike is to monitor the air pressure and temperature of two wheelers & three wheelers like motorcycles, Can-Am Spider, bicycles. It then transmits the readings to a smart phone where the user can browse. The user can set upper and lower thresholds of the air pressure. FOBO Bike will monitor the pressure based on the thresholds with its smart algorithm and will provide three levels of alerts when the thresholds are breached. FOBO Bike works round-the-clock to ensure your tires stay properly inflated. FOBO Bike does not need an external power source. It comes with batteries included which last up to two years and are easily replaceable (battery type - CR2032).