What it costs
$20 a month. One plan, with everything in it: your site, your address, your time for sale, your clients and their hours, and the assistant.
Your card is charged when you sign up. There is no free trial.
Paying
Stripe handles payment. Cards, receipts and invoices are in Stripe's billing portal, which you reach from your account page. That is also where you change a card.
If a payment fails
Stripe retries on its own schedule. Your site stays up while it does. If Stripe gives up, the site goes offline, and comes back when a payment goes through.
If you cancel
Cancel from your account page.
In the first 30 days after your first payment, you get all of it back. Your site goes offline straight away.
After that, your site stays up to the end of the month you paid for, then goes offline. Nothing is deleted right away. Coming back means paying again, not starting again.