Unlock the phone, and then click the Apple AppStore, App Store icon.
After entering the AppStore, click search in the lower right corner to enter mu Mi.
Many apps will appear after the search. Just select the first one and click Download.
After the download is completed, find the downloaded App and click the icon to enter the App.
After entering the App, you can see the main interface, showing the current location and the surrounding map.
Click the cross mark in the middle below to display a menu, and then you can select the measurement area. Of course, in addition to the standard model, there are satellite models, and the measurement area of satellite models is the same.