Given the importance of Tesla's Roadster for changing the way the general public thinks about electric cars, it's a little strange that owners have been left in the dark as far as a dedicated smartphone app is concerned.

While drivers of the Nissan Leaf, Chevy Volt or even Smart Electric Drive have used iPhone or Android apps to check their charging level or even pre-heat the car interior, Roadster owners lacked anything of the sort.

Until now.