A full version program for Android, by Web Alert.

Web Alert is an app that not only monitors your connected web pages for changes, but also informs you when those changes happen. This handy tool is perfect for you if you want to stay up-to-date with everything that’s happening on the web – at least, with everything that’s particularly related to your business. (e.g. price updates for items you have linked to in your product pages.)

This app allows you to set up the frequency for when the tool will check the page – should it be every 5 seconds or every 20 seconds? You can filter text, define your time range for notifications, become alerted to websites with SSL certificate issues. You can also get an alert for when a website is offline or down.