Sketchapp plugin, arrange icons, images and shapes in Phyllotaxis ( leaf arrangement) patterns. Leaf arrangement pattern in a sunflower, for example.
Download the zip file and double click on the IconFlower.sketchplugin file
or use with Sketchpacks or Runner
Spacing among items
Variable c controls how close or far icons get placed.
Adjust the value of c to get perfect spacing for your needs.
var c = 48; (default)
Here is an article on Medium with some more details.