Abstract
The "Giro Challenge Martelltal" app for Android and iOS allows cyclists to compare their performance to that of other athletes along the queen stage of the Giro d'Italia 2014 from Latsch to the Martelltal. The app keeps track of the cyclist's trajectory, which is compared to the trajectories already recorded in the database. For easy of comparison, the trajectories are visualized together. Additionally, the App will continuously monitor and predict the estimated arrival time.