hi dlokshin, we support the iPhone 4S and 5 because those are the only models that support Bluetooth 4.0. I'm sure we can theoretically support every Android phone out there, but as a small team, we'd rather focus on a smaller set and provide the best experience possible. Our goal is to support as many Android phones as possible over time.
The Automatic Link supports both classic bluetooth and bluetooth 4.0, so it will work with both iPhones and Android phones.
OBD-II just standardizes the connection port, meaning that you can plug in the device, but not all cars support the same information and features. Most of them do, but I'm sure that the guys over at Automatic don't want to sell someone a product that isn't supported or tested for their vehicle.
The Automatic Link supports both classic bluetooth and bluetooth 4.0, so it will work with both iPhones and Android phones.