TrackEngine is described as 'allows users to monitor any websites and to be alerted of new content on any devices' and is an website in the OS & Utilities category. There are more than 25 alternatives to TrackEngine, not only websites but also apps for a variety of platforms, including Windows, Linux, SaaS and Firefox. The best alternative is UptimeRobot, which is free. Other great sites and apps similar to TrackEngine are Update Scanner (Free, Open Source), FiveFilters Feed Creator (Freemium), Feedfry (Freemium) and DELTAFEED (Freemium).
Dashboard with 50 Monitors, Checked Every 5 Minutes, Totally Free. Monitor HTTP(S), Ping, Port and check Keywords. Get alerted via e-mail, SMS, Twitter, web-hooks or push. View uptime, downtime and response times.
Monitor webpages: Get Newsfeeds from web pages that do not deliver RSS Customization: Monitor portions of webpages via CSS selectors / ignore Ads and Social Media Elements Handling: Manage your monitorings. Get them via RSS or e-Mail
Sites Watcher checks web pages that interest you for changes. When changes are found, Sites Watcher will show you current page version with highlighted updates. As well as that, you can see previous web page version and current page version from internet.