This app attempts to help you compensate for variations in temperature when inflating your tires. The app default to 2 psi above factory recommendations in most cases. I have felt marked improvements with cold weather performance with my suv and my motorcycle. I would recommend using this quarterly to compensate for seasonal temperatures. The only drawback is the factory threshold is a maximum of 40 psi. I would like to see this broadened up to 80 psi for customers with light truck tires with e-ratings.Some of the help popups don't work or if they do the text is not justified properly and the text appears off the screen.

I’m writing this in the hopes the developer will update the app, it no longer works on newer iOS.Adjust tire pressure seasonally with this app, it’s great, can’t find another that does this.Check your tire pressure once a month. When major changes in weather, check, the pressure in your tires changes with the weather. This app helps you also compensate for higher/colder temps and when the lows & highs are greater …you need to adjust tire pressure.

In my case the tire pressure recommended is 43psi cold, the App only goes up to 40psi Max, and that's on my car, my Chevy suburban rear pressure is 80psi, can't use the App....

Having rediscovered this app on my phone, I find it very useful. Yes, it has some settings limits but it works fine with the tires on me car. If you have a vehicle with high pressure tires you won’t find this helpful. I check my tires at least once-a-week or with large weather changes. By keeping my tires properly inflated I get more tire life than the tire mileage ratings. An update for higher pressures would help more drivers.