In real world situations, one mountain is hidden by closer, shorter mountains. For my mountain research, Peak Finder adds an important dimension, elevation. Better for me than the way a topo map or Google Earth gives elevation. I love to jump from peak to peak and look in 360°. Peak Finder can be used "offline" because mountains often block cellular service. Also the PDF output is a good reference. This is a great app, and I expect it to only get better. A suggestion is to improve how Favorites are created, named and edited.
PDF maven about PeakFinder USA West