Hello! Welcome back. "Cannot Move" means you can make copies of the tile. I use this when I want students to use a tile as a template to make infinite copies of a tile. Or when I want them to roll a dice, but not move it. You can interact with a tile, but not move it, delete it, etc. "Locked" means you can't move it, can't make copies of it, can't roll it, can't change color, etc. Hope this helps!
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Hi Rachel. Our app does not have the same functionality as using the site in a browser. To access your saved Polypad on an iPad, open Polypad in a browser winder. We do hope to update the app at some point, but for now must of our energy is focused on Polypad improvements. Thanks!