You can turn your profile completely private so that no one can see any of your posts or rounds (without your permission).
To make your profile private, do the following:
- Go to the 'More' tab (3 dots) on the bottom right;
- Switch the Private toggle on.
When your profile is private, other users will not be able to see your activity. Other users can still request to follow you, and it is your option to grant their request or not.