I may be overlooking some other ways, like maybe plugins for media players or something, but the only stand-alone tool I could find was this CLI program.
Unfortunately it only takes m3u format playlists, but I think it may not be too difficult to take the JSON playlists exported from Spotify and convert them to that. However, the kicker is that I honestly couldn’t figure out how to run the aforementioned program, as there’s no executable, and simply downloading the files and trying to run the command from their directory didn’t get me any closer either.
I get the sense it may be a situation of needing to have Rust installed to be able to run it, but I didn’t feel like doing that to confirm.
It would be great if my music library was cleaned up by correcting wrong or adding missing tags but to be honest I’m way to lazy considering the amount of albums I’ve downloaded over the years.
MusicBrainz’ Picard app could start that, in a huge batch. But it would still require a bunch of eyeballing. I only do an album at a time, now and then.
I don’t have a recommendation because I don’t use iOS but the Last.fm Support Forums have the following information:
Scrobbling on iOS is more restricted due to Apple limitations for accessing third-party sites with third-party apps. So the available external iOS scrobblers mostly support only Apple Music songs that have been added to your Music library first and the local files on your iOS device, check e.g. EaveScrob 1.9k, QuietScrob 1.3k, Trax Scrobbler 971, Marvis Pro 716 and the official Last.fm iOS app 1.6k for individual features.
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