The Windows app is being tested in a closed beta phase, and it will be released soon, apparently. As already stated, apps for mobile devices (iOS and Android) are also available. Mac version is planned, and that's as far as I know.

Web apps and phone apps only for now, windows client is being developed afaik

Outside of on mobile, there’s no current desktop sync clients. It’s basically web or nothing, for now.

Which OS are you using?

hi there, wanted to loop back. the Windows app for Proton Drive has released!

there isn't one unless you're on iOS (maybe Android, i dont know)-- i just add the shortcut to the Proton Drive site on my desktop for PC.

There is an app for Android on Google Play.