Downloaded files are indistinguishable from files that are not downloaded

[nickaein]

There is arrow indicator in Android app, that helps the user to realize whether a file (e.g. music track) is already downloaded and present on its phone or not:

Note the small arrow icon on the second song.

This feature is useful when the user is on metered connection (e.g. cellular) and only want to play the songs that are already downloaded on her/his phone.

However, such arrow is not present on the latest iOS App:

Note the shown size is not always present (probably when the track name is too long). In those cases, there is no clue to determine the song is already downloaded or not.