I don't use any hiking apps for my phone. In fact, I try not to use my phone at all when I'm hiking; I put it on airplane mode and luxuriate in being unplugged. (If I'm backpacking alone, and have service, I'll let my wife know I'm in camp each night. It makes her feel better.)

I suppose a caveat is in order: I hike in Ohio-Kentucky-Indiana area, and am always on trails (no bushwhacking or open wilderness travel are needed.) It's also not easy to get lost around here - even if you get separated from the well-marked trails, there are lots of backstops (paved roads, mostly) that keep you from getting truly lost, at least for very long. So, the apps simply aren't necessary (in fact, since I'm already familiar with most places I hike after all these years, I really don't even need to get my map and compass out very often.