As of May 2015, the Viper LC3 4706V is the best remote starter for cars, according to Car Audio Now. This starter system includes smartphone control and receives signals from up to 1 mile away.
The Viper LC3 4706V has a large backlit digital display, streamlined user interface, slim profile and rechargeable battery. It comes with two remote fobs and also accepts smartphone input through the Viper SmartStart app. The Viper LC3 4706V displays the time and internal vehicle temperature, and the Runtime Reset function allows the user to keep the engine running until the passenger cabin reaches the desired temperature. Other features include panic mode, valet mode and automatic interior light activation. This starter is compatible with the Viper SmartStart GPS module.