Despite having the latest version of the iPhone, do you still write down your grocery or to-do list on a sticky note? I certainly do; sometimes it’s simpler to write a list with a pen on paper, and then cross them off as completed, rather than type them in a notepad or calendar app. If you feel the same, then take a look at these Paperback adhesive notes. They fit perfectly on the back of the iPhone (removable adhesive covers most of their surface), and give a little more room to jot notes than a traditional sticky note. Use one at a time, or attach a small stack for additional lists later on.