Lazar Focus, henceforth LF, runs entirely locally on your Windows machine.
It saves all of its data into a local database. It’s your data, so it remains on your PC.
LF never makes contact with anything outside of your PC.
In future, it might have to contact a server to verify your license, but this is not the case yet.
LF is not able to make any video or audio recordings, or to access any other data on your PC.