Then flash it on an OS that's not connected to the Internet? That's what I do anyway. For some that's a pain, but over time I learned to have an OS that's airgapped for privacy reasons.
Obviously it’s not the end of the world for technical people who are in the habit of looking inside all new applications’ settings and reading their privacy policies, but it means I could never recommend this app to anyone in good conscience knowing they will probably skip all of that and get spied on.