unable to add Album to existing playlist in android app

[ryfor]

Not everyone has PCs, this should be addressed! You can do in on pc, but not android. This sometimes means adding thousands of songs one by one instead of 15-20 at a time. Are there any plans to add this functionality back?

[Daniel]

This has been mentioned several times. No point in creating a new thread. Instead you can show your support by adding kudos to this idea:

[Android] Add an entire album to an existing playlist