Choose the type of payment model you get charged by. There are several ways you could get charged: Subscriptions, Pay-per-use, Life-time, Free
Depending on the type of payment model there are different fields to fill out:
Subscriptions - Choose which currency you get charged in, how much you get charged each time and how often you get charged.
Pay-per-use - Choose which currency you get charged in and how much you get charged per month.
Life time - Choose which currency you got charged in and how much you paid.
Free - You don’t pay for a free service and there is nothing here to fill out. :)
If you get charged different sums each month for a service you can add an average amount to let Substly show your approximate spend.