YAMAP is a free travel and navigation app developed by SEFURI INC. It is the most popular outdoor app in Japan and aims to make outdoor adventures like mountain trekking and skiing safer and more fun with your smartphone. The app does not require a mobile signal to track and log your outdoor activity, and detailed outdoor maps provide necessary information like elevation, parking, and trailhead locations. You can easily build an online outdoor journal and share your love of the outdoors with family and friends.

The YAMAP app has three main features. Firstly, it makes your smartphone a special GPS device for the outdoors. Secondly, YAMAP's maps can be used as digital ones on your device and as ones on paper by downloading them to your PC or tablet. Lastly, you can easily share your outdoor data with your family and friends through YAMAP by uploading it to your online 'ACTIVITY REPORT,' where you can view your route, outdoor data, and comprehensive workout history. The app also provides a Wear app for CASIO Smart Outdoor Watch (WSD-F20, F21, F30) users. However, it is important to note that continued use of GPS running in the background can dramatically decrease battery life.