Not just designed, lawnchair is a fork of the AOSP launcher which is why they look so similar. It’s also partially why they have a comparatively slow development cycle, because they spend a lot of effort rebasing whenever AOSP’s launcher has significant changes.

Lawnchair doesn’t have a paid version, it’s open source

They can also use live location data in an emergency situation,also using a court ordered subpoena.

What qualifies as an “emergency situation”? I imagine that definition could be stretched pretty thinly