Exact Altimeter uses different ways to determine your altitude. It has built in elevation database, and it can get your altitude from online service. Furthermore, it shows you the altitude given by the built in GPS.
✓ Built in elevation database
✓ Altitude from online service (internet connection is required)
✓ Speed measurement and display
✓ Possibility to show you the altitude of any points you tap on the map
✓ Displaying the name, distance and course of the center of the closest settlement
✓ Displaying your current movement direction
✓ Current position display
✓ Possibility to use imperial or metric system for display
✓ Customizable display colors
(Please be aware, that the online altitude service and the database altitude means always the elevation of the ground, so if you are in a plane, they won't show your current altitude).