Using GPS, LocTracker tracks your location when you are walking, running, biking, sailing, riding, gliding, ... It calculates time, distance and speed information and (if relevant) change in altitude. You can visualize your trail on a map and save it for later reference. Saved trails can be modified, deleted or exported in GPX format. When recording, the app recalculates the numbers every 3 seconds. A number of regional and display settings can be configured.
The outcomes entirely depends on the GPS and location capabilities and accuracy of your mobile device.