Mountain First Aid is an iOS/Android app designed to assist mountain climbers and hikers in emergencies when Wi-Fi and/or mobile data are unavailable. It provides help for situations such as fractures or insect bites, guiding you on how to immobilize the affected limb or treat the wound. The app works offline, so you can download it and use it on your phone without needing an internet connection. Hopefully, you won’t need it often, but if you do, it’s here to help many of you out there.