I recently purchased a small refrigerator whiteboard and it's been really amazing with the combination of my iPhone's ability to take a picture of my handwriting (script or cursive) and copy/pasta into a text. It's not always perfect (nor is my handwriting!) but it's good enough to just replace a character or two and hit send.

This really tickles a bunch of things for me:

1) I am not sending a whole image (it's efficient)

2) I don't have to type/swipe at all (I'm not looking at a screen)

3) My s/o has easy access to the list at all times (it's not in a cloud)

4) It requires no power to update/maintain (markers last a long time)

5) It just feels so natural to grab a marker and write on the fridge when I exhaust something in that same fridge.