Pie Launcher does not collect any personal information.
If you have any questions or suggestions about this Privacy Policy, do not hesitate to contact me.
A launcher app needs to be able to query all packages to show all packages.
You can find more information about package visibility here.
A launcher app is meant to be available all the time.
Disabling battery optimizations for Pie Launcher actually saves energy and make it work faster because the app does not need to be reloaded every time you unlock your phone.
Pie Launcher does not consume battery when not in use.