You need a mobile Android device that can provide GPS data.
To read the diagnostics data from your car, you need a Bluetooth OBD adapter. These adapters can be purchased at affordable prices.
RDE Tests #
For conducting RDE tests, your car must provide all necessary diagnostic data. The app checks compliance once it is connected to the Bluetooth OBD adapter. As a rule of thumb, cars that do not use diesel exhaust fluid (also known as DEF, AUS 32, Ad-Blue or urea), are not compatible as they do not have an onboard nitric oxygen sensor. If the car uses diesel exhaust fluid, chances are high that it is supported.