Changedetction.io is a service designed to detect whether changes have been made on a specific website. This is like a more advanced version of the Python website monitor project.
This service works by grabbing a page’s output periodically. Then, anytime a change is noticed, the service can send you a notification, presenting you with an easy way of seeing what exactly changed since the last update.
The Raspberry Pi makes an excellent choice for Changedetection.io as it is a relatively low-powered device that can be affordably left running 24/7.