No, you can use your own account if you like but the “default” usage is to log in anonymously

Sorry, I’m confused here, why do you need to make a Google account?

I wouldn’t have minded using their app instead, but I don’t have the Play Store on my phone (I’m on GOS)

Any reason why you aren’t just using the Aurora store?

Thank you for your work on this project!

I think they aim to accomplish different things. Muxarr doesn’t download any new subtitles or audio tracks, only deletes and renames ones already present in the file