PIP LT [Peripherals In Phone Light] will help you traverse the wastelands using the built in compass. But wait, there's more! If you act now, you'll also get an angle finder, flashlight, and a map to boot!
So with this app on your device, grab your favorite cola and head for the high ground to avoid the fallout!

To remove the ads, upgrade to better performing Apple Maps, and get Landscape & Cosplay modes, please consider switching to "Pip-Toy" which is version 2 of the PIP Compassapp.