Not very straight forward, but it should work :)
There's this tool that can fix capture times: https://github.com/mattwilson1024/google-photos-exif
There are perhaps more that I'm unaware of.
However, your reply gives me pause. The website says the apps are open-source, the other comment says the server is now open-source. Does that mean there's some pluggable black-box magic that the subscription enables?
To ask another way, if I self-host the server, can't I build the desktop app, import from Google Photos and then somehow export from the self-hosted server? Maybe not as ideal as a purpose-built script? Or is this not even possible?
So there is no black-box magic that the subscription enables. Our live, breathing production setup is available in a monorepo here[1].
> is this not even possible
This is very much possible.
I've added an updated comment here[2], thanks!