A flexible Python script that alerts you when a website has been updated via SMS using Twilio
Beautiful Soup
pip install beautifulsoup4
Twilio
pip install twilio
You will need to have a Twilio account set up (a trial account will do for testing). If you're not familiar with Beautiful Soup and accessing parts of the dom, check out their documentation.
To use the script from the command line:
python readAlert.py
You can easily adapt this script to scrape any site and send custom text messages. This version keeps a crude log in a text file but expanding it to use a database would not take long if that fits your needs.