Purchasing Kali

So, are you tired of the 15 minute limit in the demo? Go ahead and
register! The price of Kali is $20 (US dollars). When you buy
Kali you will get your own personal serial number and key to unlock
the full power of Kali. Play until you drop.

Once you buy Kali you will be assured free upgrades when Kali is
improved...even if the price goes up in the future.