[danhor]

You can use it on a device without GApps, so without closed-source google code, using only the open source Android codebase (and the blobs and drivers from the manufacturer, depending on your device). This means you don't have to trust Google.

[danhor]

It uses code from microg for this, which is a free GApps replacement, but needs to be installed at a system level, while this can work on any device