A free program for Android, by KHTSXR.

If you are on the hunt for a reliable speedometer app, look no further than the GPS Speedometer app. With this tool, you can easily keep track of your speed, total distance, current distance, and maximum speed, and even receive speed limit alerts. It is great for those who want to monitor their driving speed, whether it’s for personal or professional reasons.

This is very simple and easy to use. It also has a user-friendly interface, making it easy to navigate on the go. However, keep in mind that the app has some limitations in cloudy weather and indoor places as it uses GPS.