A paid version of Ukuu is now available with more features. https://teejeetech.in/2019/01/20/ukuu-v19-01/ Kernel Update Utility for Ubuntu-based distributions. Provides desktop notifications when new mainline kernel is available. Lists kernels from http://kernel.ubuntu.com/~kernel-ppa/mainline/ with options to install and remove.
Can we get the notification dialog to appear only once? Or not appear again until the previous one has been acted upon? This is my backup machine, which I haven't logged into for about 10 days. When I connected, I find the desktop overflowing with UKUU popups. It's kind of ridiculous.
mablae
commented
6 years ago 
Can we get the notification dialog to appear only once? Or not appear again until the previous one has been acted upon? This is my backup machine, which I haven't logged into for about 10 days. When I connected, I find the desktop overflowing with UKUU popups. It's kind of ridiculous.