My name is Jonatan Heyman, and I made this website mostly just for fun, and because I like single purpose websites. Also I sometimes wonder what altitude I'm at, and now I can use this site to find out.
I have no idea if it's actually useful to anyone else.
Two other websites that I made - that are a bit similar to this site - are Motels Near Me and Cheap Motels Near Me. They show you motels (instead of your altitude) near your current location.