I have been using this add-on for close to one year now and it has been a lifesaver when I am waiting for a reply knowing when it arrives. EXCELLENT! Highly recommended.

I just realized I've been using this addon since 2011? 2012? It's been a massive amount of time, and it's still one of the first I install when setting up a new browser.

I can't recall ever having an issue, it's rock solid and works perfectly for how I use email.

I monitor 9 diff. email addresses from Checker Plus. Nothing better.

Unobtrusive and easy to use, this add-on has really helped me be more mindful of my messages. I'm easily distracted and the fact that there is a built-in reminder via the 'Repeat Notification' function is wonderful. The UI is easy to navigate and the customization options are near endless, so you can easily match Checker to any other themes you might be using. The only problem I ran into was with upgrading (which was entirely on my end), so I reached out about it and got a super fast feedback message from Jason that sorted things out immediately (Thanks again for that!)

I'd 100% recommend this add-on to anyone, but especially to people like me that are more accustomed to Discord and Steam style desktop message notifications and looking for a similar interface.

Nice UI, wonderful functional. Like it very much

Needs a snooze button.

Is one of the most useful extensions, i can clean my Gmail in seconds