This is a simple application reading basic OBD II parameters and shows speed and rpm widgets on top of any app.
First you need an OBD II Bluetooth adapter attached to your car (like elm327).
- Pair your OBD II adapter to your phone
- Open OBD Widgets and connect to your OBD II adapter
- Speed/RPM gauges will be shown
- Now you can open your preferred navigation app and always keep an eye on speed and engine while driving your car.