Some Clover apps are free, and others you’ll need to pay for. If you download a paid-for app, you’ll be billed for it monthly by Marketplace Merchant Solutions Limited (on behalf of Clover).
Your first bill will include both your first month (this will be backdated) and then the next month, in advance. So for example, if you downloaded an app on the 12th July, you’ll receive your first bill in August. That bill would cover the time in between the 12th July and 1st August (this is the backdated bit) and then you’d be billed for the month of August in advance as well.
After that, you’ll be billed in advance each month until you decide to uninstall the app. It’s important to remember that your monthly subscriptions are non-refundable, so if you do want to uninstall an app, it’s a good idea to do it before the 1st of the next month so you don’t get charged for the month ahead.