Off the drive, switch on your WiFi
Switch on the WiFi when off the road. Saves a lot of cellphone juice. Applet is simple. Works in conjunction with you Automatic OBD2 device connected to your car. The moment you shutdown your car engine WiFi on your device starts up. Saves a lot of battery power when on long drives. Use it in conjunction with the other Applet of mine where the WiFi is turned off when the engine is fired up.