How does billing work with Cloud Softphone?

Cloud Softphone uses PayPal’s “Billing Agreements.” Billing agreements are created for clients. These billing agreements spell out all of your one-time and monthly fees. By agreeing to the terms, you permit Acrobits to charge your account for the usage of the application each month. This total is based on the number of days the application was used.
Should you decide to remove/add a feature, your next bill will be prorated to reflect that change.

The same terms apply to wire transfers.