
Everyone with the link sees the same list. Tick something off and it turns up on the other phones a second or two later — even from inside the store.
Whoever sent you the link will tell you what it is. You type it once on this phone, and it never leaves this phone.
Pick the store you are standing in at the top, then tap Got, Swap or Skip on each row.
Tap any of these to try it — the screen changes as you tap, and nothing is saved anywhere but this phone. Auto follows whatever your phone already does. Colour blind? Try Clear.
Too small to read? Tap Text size at the top of the screen. Light, dark and the looks are under Menu → Appearance later.