When walking exercise, measure your speed when running.

Depending on the instrument panel, you can change the number.
If you live in the country, you can change the speed unit.
Settings button to set the GPS location services, you can quickly
Current speed, maximum speed can be checked.

Please measure your movement speed.

Make sure that third-party apps are allowed on your device: go to Menu->Settings->Security-> and check "Unknown Sources"

Tap the APK file. Allow the app any required permissions it asks for. Then, at the bottom of the installer window, click INSTALL.

You'll see a confirmation the app is installed. Now you'll see the app available in your list of installed apps.