QR Codes should be a first class citizen baked into Android itself. e.g. camera app integration and on screen scan built into pull down menu.
QR Code generator for easy production of text, emoji, or noun project icons with verifiable readability. Potentially a web app that makes it easy to print them out into different sticker formats.
Easy to deploy edge computing unit to integrate POS with menu and seating via QR code. Integrate back staff pump bar platform.