The best alternatives to Kelvin (Beta) are Siftery, App Review Monitor, and Tor Messenger. If these 3 options don't work for you, we've listed a few more alternatives below.
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Rating is a lightweight app for managing ratings using user-created lists. It allows you to Add ratings for your favorite stuff, such as movies, TV shows, food or anything else. Create lists for all these things, which would allow you to easily manage everything you've ever rated.
SitesRank score is a way that our extension measures the safety level of a domain. The higher the SitesRank score, the safer the domain and its content.