This app stinks

Dont waste your money on this app. I can never get a signal when using this app. I keep getting the message that there is no signal and the app will not guide me. I put a TOMTOM car navigation system right next to my iPhone in my car, and the car navigation always has a signal and the iPhone always says no signal.
Now I have to figure out how to "return" the app and get my money back.
Wish me luck.

Unionftr about TomTom U.S. & Mexico, v1.8