I may not need to purchase a speedometer. This app did it for me. This app can accurately calculate speed! I got into my car and tested it out, and it was accurate. I just recently bought my son a go-kart, so I would like for him to have something to check his speed. He can just use this app. Other reviews said that the ads were unbearable, but as far as I can see, all that shows up is a banner at the bottom of the screen every once in a while. Thank you for making this app, it is very useful!

The free version with ads is great. Ads are unobtrusive and small, even thought out evenough that when the app asks if you want to leave a review and you’re driving the speed moves above the pop up and still works. Very reliable, it will lag on heavy acceleration and deceleration, but I would recommend this app for anyone in need of its basic, but reliable usage. 5 stars for convenience, thinking through the pop up for the App Store was what really made me leave it up and once I got home decided to write this.

After getting pulled over for speeding (and getting a warning-whew!), I found me speedometer was showing a speed under what I was going. I used this awesome app to find out how far off the speedometer really is all the way through the speed range. So much better than trying to stopwatch to mile markers like I did for the last vehicle with this problem. And…the app is free!