I use Trello concurrently on both my phone and on my laptop, depending on where I am. I make use of filtering by completed vs. uncompleted items in the list I'm working from. It's a daily routine, so I appreciate that the items don't just get deleted. I uncheck each card in this list every morning. (It's a little tedious, so I would love an "uncheck all cards in this list" button. My husband wants this feature also. We'd love an "uncheck all" for checklists within a card as well.)
But what I'm actually writing about is a bug I've noticed. I keep the list - the same list - filtered by incomplete items - on both my laptop and my phone so that I can go back and forth seamlessly. However, when I MOVE a card up one notch - it's pretty much a single card that I move to keep track of how far down the list I've gotten, since I can't always uncheck each item in order from top to bottom. When I MOVE the card on my PHONE, the order of the nearby card gets messed up a bit, and I have to move the messed up card back to the correct spot. Every single time. However, when I move the card on my LAPTOP, this does not occur.