Buy your licence key
$34.99, one time. No subscription, no account. You've already got the app running its free 15-day trial -- this just keeps it unlocked once that's over. Nothing new to download.
Don't have the app yet? Download the free trial first.
Pay with PayPal
You don't need a PayPal account yourself to use it -- PayPal's own checkout also takes debit and credit cards directly. It opens in a new tab; this page stays open behind it.
You'll be asked for an email address on PayPal's own checkout page -- your licence key is sent there, usually within a minute or two of paying.
Already bought it and lost your licence key? Get it by email again. Anything else -- a payment that didn't go through, a question before buying -- email sales@chessmasterytrainer.com.