Meet the Smart GasWatch: a Bluetooth-enabled propane tank scale that lets you know how much gas you have left and what you can do with it. It is compatible with iOS/Android devices. This safe gadget provides you with low level alarm to take the guesswork out of the process.
To get started, just put your tank onto the GasWatch ring, turn on the device to pair it with your smartphone, and you are set. Like what you see? You can find out more about it on Indiegogo.