Portes du Soleil Summer is a free Android app developed by Yoomigo that offers a wealth of information and features for those looking to explore the French-Swiss village resorts in the northern Alps. With over 48 signposted trails spanning over 400km, this app is perfect for those who love to run or mountain bike. Users can select their starting point, distance, and difficulty level, and track their progress in real-time with the GPS tracker. The app also includes information on track conditions, water and vantage points, and live webcams for checking the weather. The rescue function is an added safety feature that sends the user's exact GPS location to rescue teams in case of emergency. Additionally, the app provides information about summer activities and trail events in the Portes du Soleil area.