Bluetooth Tethering on Demand is a useful app, that makes your phone work as a Bluetooth server, for any device that connects to it. This is especially useful for car drivers, in case you have a smartphone and you want to use the internet connection. With this app, you can automatically disable Bluetooth when you disconnect from the internet, or connect it again, when you re-connect to the internet. This will save a lot of battery, especially in case you are using the internet for a long period of time.

The best thing is, that you can use this app for any device that has Bluetooth, not only cars. This app can be used for tablets and other mobile phones.