Developped on Fairphone1 this App calculates distance, instant speed, average speed. It's suitable for Running/Biking. It also logs all these data (plus location information) in a CSV file that can easily be imported in libreoffice for example, for offline analysis. At this stage, application is a beta that need further testing on different device. Feedback is welcome.
Enhorabuena por la aplicación. Sencilla y útil.