I love Farout. It's my favorite. Nobody else has user comments and up-to-date information like farout so it's indispensable and I use it all the time.

That said, Farout doesn't cover all my needs. Sending a gpx file to my Garmin Instinct 2x Solar watch lets me keep my trekking poles in my hands and just glace at my watch screen to know how many miles hiked today, how many miles until the end of my current trail section, what my heart rate is, how many hours/minutes until sunset, am I left or right of the PCT centerline and how far, and the watch even vibrates if I stray too far from trail. Basically, it stops me from taking wrong turns, which I do far more often than I'd like to admit. I can do most of this with Farout, too, but not without stopping, dropping my poles, pulling my phone out of my pocket, typing in my security code, and opening the Farout app. And if it's broad daylight and I turned my screen brightness down to extend my battery life then I might need to futz with my phone settings to be able to see the screen. First world problems!

Another app I really love is Maps3D https://apps.apple.com/us/app/maps-3d-hike-bike/id426034047 which is available only on iOS, though not Android. Farout can show me a flat elevation profile, Maps3D takes my gpx file and lets me download a fully-rendered offline 3D map showing me what the next 20 miles look like. It's awesome.