Yes, Google Fit can be used on the Xiaomi MIX Flip. Here are the steps to connect Google Fit to your Xiaomi MIX Flip:

- Open the Mi Fitness app on your smartphone.
- Go to your profile and select the "Third Party Data" option.
- Select Google Fit as the third-party application you want to synchronise your data with.
- Sign in to Google Fit in a separate window.
- Select the data you want to share with Google Fit and confirm this option. Your selected data will then be synchronised automatically.