Fitness Tracking App Strava Locates Secret US Army Bases The app may have just revealed sensitive military information around the world. Strava allows users to share their running routes via a "heatmap." The heatmap outlines running locations of those using the app. And experts recently realized its potential to reveal military bases in remote locations. The app seems to highlight military bases in Syria and Afghanistan showing the running paths of soldiers who are based there. Strava claims to have 27 million users around the world.