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PageCrawl.io might be a bit more popular than Fluxguard. We know about 1 link to it since March 2021 and only 1 link to Fluxguard. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
If you are really serious about keeping up-to-date (and probably few people are), then "watch" the page from which you downloaded the appimage with some notifier such as [FluxGuard[(https://fluxguard.com/). Because AppImages are so self-contained, you really don't need to update them unless you are needed new features or encounter bugs since updates to your system will almost never affect them. Source: over 2 years ago
Pagecrawl.io - Monitor website changes, free for up to 6 monitors with daily checks. - Source: dev.to / 3 months ago
Sken.io - The most advanced tools for tracking changes on websites.
Distill.io - Distill.io is one of the advanced page monitoring tools used by professionals to monitor dynamic pages, feeds, and iframes.
Visualping - Visualping is the easiest to use website checker, webpage change monitoring, website change detector and website change alert software of the web. Read more about Visualping.
ChangeTower - ChangeTower offers website monitoring tools for new content and content changes.
OnWebChange - OnWebChange is a brilliant online service for tracking changes to web pages and parts of web pages, pdf, text and image files. Get notified by email.
Pagescreen - Track any website visual change. Effortless.