On iPhone, Yes. The iOS app is configured to work with an OBD BTLE connected car adapter.
On Android, we highly recommend it. Connected car adapters provide the clearest picture of your driving state, and enables the most functionality. If you can’t use a connected car adapter, the app can be configured to use your car’s built-in Bluetooth or hands-free Bluetooth headset; but this limits the accuracy of the solution and requires the systems to be manually activated each drive.