This brand name is a playful take on the word "retina".
The word "retiny" contains only six characters and three syllables. Three syllable names are used by established brands like Delicious, Santander and Microsoft.
Retiny.com is a dot com domain. Dot com is the most valuable domain extension. Once you own a dot com, it will be much easier to rank for your own name in Google.
This domain was first registered in October 2016. Older domains have an advantage when ranking in search engines.