I didn’t plan to write software in the grocery store last night. I was tired and hungry, kids in tow. My long shopping list sat in a text message. I wished I could check items off as I found them. Ideas filtered through my head: I could transfer the list to a piece of paper: too tedious I could copy/paste it into a notes app or an email draft and delete items: too much tapping I could search the web and app store for a thing that would do what I want (of which there were no doubt a great many): slow and painful and annoying Nope nope nope nope nope.