As a default, we offer the trial version for 2 days of using when you register a new account.
It depends on the marketing program in the time you use the app, we will continue offer more days in case you want, for example, 1 week or 2 weeks.
If the marketing program ends, you should buy a license. There are some subscription type: 1-month, 3-month, 1-year license ...
Here is a article to teach you make a payment:
We have many discounts in our main site mobileleak.com, you should find the menu Discount & Ticket.