Mountain Watch M-Watch is a free Android app developed by SKYAPPS, which provides a comprehensive set of functions for mountain climbing enthusiasts. Its main features include a watch, compass, barometer/altimeter, speedometer, flash, moon phase, and weather information. The app is designed to mimic a professional climbing watch, with its main screen displaying all relevant information. It also has a settings option that allows users to choose between Celsius and Fahrenheit for temperature display, and an instruction manual for reference.

The current time, compass, barometer-altitude, and speed information are displayed in the center of the main screen, while the weather and temperature, humidity, wind speed, sunrise/sunset time information are displayed on top. The location and moon phase function are displayed in the lower area of the screen. The app also has a map that marks locations, and a flashlight function that can be used in low-light conditions. However, it should be noted that the app does not guarantee 100% accuracy of the data and that high-accuracy GPS usage can consume battery life quickly.