pingnow.io is an amazing web app which makes it easy for anyone to monitor the uptime of a website , website owners can make use of this wonderful web app and also anyone from any part of the world can use the web app to always check the uptime of a website to know whether the website is available or not..
When the status of a website changes, the website owner who used the pingnow.io will be notified via email..
Why i like the web app is that you can use it to monitor a website for free...Though you will need to upgrade if you want to monitor more websites.