This app maps and measures hikes or bicycle rides. The emphasis is on elevation, with several useful features.
The app provides current elevation, and touch elevation for any point tapped on the map.
A map and log of each trek can be saved and easily retrieved later. The trek logs the elevation at every automatic waypoint and also tracks the total rise and drop and of a journey. These trek logs and maps can also be copied, modified or even created manually from scratch.
The app can also build an elevation grid for an area up to 2 miles square surrounding the hiker. (This works for the USA only.)
These elevation features do not rely on the phone's error-prone internal sensor, but instead use a more accurate location-based database lookup.
A useful feature called GeoNote allows the convenient automatic emailing of verbally-entered and geographically-tagged comments and observations. These are sent to a preselected email address and include your current position marked on a linked Google Maps page. GeoNote can also be used to share field position with another user of the app.