If you are an app developer you will know the problem. You start an app but require many different icons, in different sizes different colors, and different variants. If you get the icons as vector or there are many changes over the time, you will always have to get the correct drawables again. This consumes a lot of time!
This download is completely secure. The app has been originally designed by Mike Penz and it refers to the Libraries & Demo category. The developer rolled out a new version of the tool on Sep 30, 2020 and over 10K users downloaded and set up Iconics Library.