I need to review this tool, it deserves that. Upbase is simple to work with, a simple UX, but do not let that fool you, as there is so much under the hood. We use this with 3 VA´s, and they love it too, in comparison to Asana, Trello, etc. It has everything from docs, files, Lists, Kanban, Calender, Tags, team chat :) Keep on updating, we love it!
My UX tip for upbase: Look at the Left side navigation menu at Shopify. They use very nice icons (very small) where you are in your navigation. At this moment with upbase, the navigation topics below Schedule and My Tasks are not quite clear to me. Lists, Filters, Tags, etc. Make them more "recognizable" like the first 2 navigation points.