Helium a plain yet professional Icon set is made to be used for app icons. but it can be used for a variety of tasks like backgrounds, wallpapers, and designs. The icons emit a feeling of nostalgia from it’s users and has qualities of something they would enjoy from their childhood. The plain white of these icons are basic, but also special due to the artistic detail given to them. If your looking for a very high quality freebie this is one you should definitely download. The icon set is available to download for free, but can’t be resold or redistributed.