Can I buy only one application and purchase others later?

When purchasing WebAsyst whether open-source scripts or online services you can choose only those applications you currently need. As soon as you feel the necessity to add other applications you can purchase them at a later time.

If you use online services additional WebAsyst applications become accessible just after their installation in section "Account -> Upgrade/Downgrade" (and the receipt of your payment if you have chosen a paid tariff plan). In case of PHP scripts installed on your own server you need to run automated update using WebAsyst Installer which will result in newly purchased applications added to the system.