Its not an app, but you could use the stremio web server, which would also keep you in sync with your other devices

In f-droid settings under 'Repositories' you can add the izzyondroid repository url (just search for it online) this allows all the apps under it's umbrella to be accessed through f-droid

I second this

I get a notification of malware from that address pretty often, could someone explain what it is?