It's not ideal but I've already been using google sheets for the exact same thing on my phone. Also just now I've tried it by using Chrome and viewing the Desktop version on mobile and it works well enough for me.
Thank you for creating such a great feature for this website! Would it be possible to create a view that combines multiple collections/shelves instead of them being separated to their own tabs? Like if you could perhaps select the collections you want to include in the table?
