This brand name is a playful take on the word "retina".
The word "retiny" contains only six letters and three syllables. Examples of three popular syllable names include Sainsbury's, Toshiba and Heineken.
Retiny.com is a dot-com domain. Dot com is the most valued domain extension. When you own a dot-com, it is much easier to rank for your own name in search engines.
This domain was first registered in October 2016. Older domains have an advantage when ranking in search engines.