You need both. We've used Boomerang for parental controls. On a device with Samsung Knox, you can prevent the kid from working around and/or removing Boomerang. I think there's an article on the Boomerang web site on how to set them up together. Source: almost 2 years ago

I also personally don't use the built in parental controls but a 3rd party software on both daughter's amazon tablets and xioami phones. https://useboomerang.com/. Source: almost 3 years ago

Https://felixgray.com/ looks alive and well. Is this the company? Source: about 1 year ago

I've heard that Felix Gray makes the best ones, but I've not been able to get some yet. If someone can confirm they've tried them, that would be great! Source: about 1 year ago

I know many like: https://felixgray.com/. Source: about 1 year ago

I have a pair of clear ones for day time use and amber ones for evenings and/or active migraines as I’m super sensitive to light. I 100% swear by them! It’s something you can’t really tell right away but I notice over time. 🤷‍♀️ these are my favs; https://felixgray.com/. Source: about 2 years ago

If you want the cheapest option, ask your Lexis rep for a pair, they gave some out last semester in the study boxes. For an actual brand, try Gunnar or Felix Gray. Source: over 2 years ago