It'll be fine.
Have you ever caught anything while using this App that you had to make an adjustment for? Ie. high tranny temps?Do yourself a favor. Get the Torque App, install it on a 7" or 10.1" Android tablet computer or a large screen Android smartphone and use it on your trip. There are a number of threads here on TT that discuss configuring it to monitor your Tundra's various systems. I use this app whenever I tow to monitor the coolant temp, Tranny Temp, Tranny Pan Temp and other things. The Tundra is a great truck and the Torque App is a great tool to have when towing.