Alti Watch is a free altitude display instrument available for iPhone and Apple Watch. This handy app allows you to view your altitude and customize the initial values for more accurate altitude measurements.

With Alti Watch, you can easily access your altitude information on both iPhone and Apple Watch. The app supports running on Apple Watch separately, providing you with the convenience of checking your altitude right from your wrist.

In addition to displaying altitude, Alti Watch also supports longitude, latitude, and geographic location on Apple Watch. Simply tap the screen to switch between different information display interfaces.

For Apple Watch users, Alti Watch offers the option to quickly start the app from the complications. This means you can access your altitude information with just a glance at your watch face.

It's worth noting that continued use of GPS running in the background can significantly decrease battery life. So, be mindful of this if you plan to use Alti Watch for extended periods of time.

Overall, Alti Watch is a useful altitude display instrument for iPhone and Apple Watch users. Whether you're hiking, climbing, or simply curious about your current altitude, this app provides a convenient and customizable solution.