Meet the GasWatch: a smartphone compatible device that lets you see how much propane is left in your tank. The Smart GasWatch connects to your phone via Bluetooth and lets you know when you are running low on propane. The Smart GasWatch shows you the remaining cook time to take the guesswork out of the process.
The Smart GasWatch is designed to tell you how much propane you have left and what you can do with it. Just bring your iOS/Android device, and you are set. You can find out more on Indiegogo.