Indeed it's not available on mobile. Unfortunately, as it stands it would be too much work to get it working there, sorry!
Could you tell me what happened in more detail? Have you tested SSS without other add-ons to see if the popup not closing could be related to another plugin? I've never encountered this, so it may be due to external reasons.
I also couldn't understand what happened with Pocket. Can you explain what you tried to do? Thanks!
