You can purchase the legitimate version directly from the Sonic Cat website.
If you are interested in using Purity legitimately or finding legal alternatives, here is the information you need: Official Version & Purchase
Intrusive software that floods your browser with ads and slows down your PC.
The official workstation is developed by Sonic Cat . It is known for its low CPU usage and a wide variety of sounds inspired by vintage hardware workstations.
A free sampling plugin with a massive community library of unique, high-quality instruments. Important Security Warning
If you are looking for high-quality instrument workstations for free, several developers offer professional-grade tools that don't require cracks: SampleTank 4 CS
(Steinberg): A powerful, free instrument player with a high-quality library.