SpeedOMeter
A little widget that given an Observable gives you an updated SpeedOMeter.

Getting Started
You should ensure that you add the following dependency in your Flutter project.
dependencies:
speedometer: "^1.2.0"
You should then run flutter packages upgrade or update your packages in IntelliJ.
In your Dart code, to use it:
import 'package:speedometer/speedometer.dart';
Example
An example can be found in the example folder. Check it out.