Here is an app controlled tiny printer that combines with your smartphone to print small notes and stickers. The Poooli Pocket Printer can be used for lists, memos, emojis, and everything in between. It has a convenient 2.26″ auto cutter. The printer has a resolution of 203dpi. It uses thermal paper to get the job done.
This printer runs on a 1000mAh rechargeable battery. It works with iOS and Android devices. More information is available here.