This article assumes you have Python, PIP, and Flask already installed.
ngrok Agent
To share a local Flask development server with someone else, simply run:ngrok http 5000.
You may also need to update your SERVER_NAME and APPLICATION_ROOT in your Flask app configuration to the values provided by ngrok. See the Flask docs for more information.
Note: For users on the latest MacOS, there is an issue where the default port 5000 (and 7000) is used by Apple AirPlay Receiver. You can use a different port for your Flask app or disable the Apple AirPlay receiver by disabling it in System Settings > General > AirDrop & Handoff > AirPlay Receiver.