Grandeur Nature is a free Android app developed by Yoomigo, designed to enhance your trail-running experience in Flaine and Les Carroz. The app offers detailed maps for offline use, including French IGN maps and Open Topo maps. It also embeds all the routes and associated elevation profiles, making it easier for you to navigate.

The app has a range of features to help you during your trail-running adventure, including the ability to record your chronos, get your location on the detailed IGN maps with GPS, and receive alerts if you move away from the route. You can also call or send an emergency SMS in case of problems, send predefined SMS to your contacts, report problems on the route, add comments, and share your experience on social networks. Additionally, the app provides weather updates for Flaine and Les Carroz from OpenWeatherMap.

To access all the features, you need to use a Trace de Trail account. However, be aware that continued use of GPS running in the background can significantly decrease battery life.

Overall, Grandeur Nature is an excellent choice for trail-runners who want to explore the beautiful landscapes of Flaine and Les Carroz with ease and convenience.