Rough Country speedometer calibrator

[Usa450r]

I purchased the Rough Country calibrator and completed the install today. It was very easy and took approximately 5 minutes. I now want to check for accuracy. What app do you recommend to check and see how accurate your speedo is?

 

[LincolnSixAlpha]

I would think you could pretty much use any "speedometer" related app on your smartphone. I can't remember what I've used in the past, but pretty much, any of them would be just fine for reference or comparison purposes. Google maps seems to have this feature now as well.

Check your speed - Android - Google Maps Help

Important: Speedometers shown in the Google Maps app are for informational use only. Make sure to use your vehicles's speedometer to confirm your actual driving speed. The addition of a sp

support.google.com

 

[Usa450r]

Checked my speedometer calibration via GPS app. I was off by a few mph on a setting at 34.75” tires. I set the Rough Country calibration to 34” tires and rechecked with GPS. Now my mph is spot on. Process took less than 5 minutes.

 

[Neurobit]

I would think you could pretty much use any "speedometer" related app on your smartphone. I can't remember what I've used in the past, but pretty much, any of them would be just fine for reference or comparison purposes. Google maps seems to have this feature now as well.

Check your speed - Android - Google Maps Help

Important: Speedometers shown in the Google Maps app are for informational use only. Make sure to use your vehicles's speedometer to confirm your actual driving speed. The addition of a sp

support.google.com

Spot on L6A. You're going to the island...