Positional is a free, open source, and very simple app with one goal: Get your altitude and GPS coordinates as easily and quickly as possible. You can switch to the metric system and back by simply tapping the altitude unit beneath the number. Positional will remember it and use the same unit next time you're in the app. There are plans to show more position information (like bearing and speed) and allow more configuration in the future. If you're looking to remove the ads at the bottom, hold tight. The next release will have that functionality. Send me an email or create an issue at https://github.com/miketrewartha/positional if you've got other ideas for improvement. Enjoy.