Is there a free trial, how long is it, and what happens when it ends?

Yes. Every new account starts with a 30-day free trial of the Growth plan, and no card is needed. We email the owners a week, three days and one day before it ends. If nobody has chosen a plan by then, the account becomes read-only: you can still sign in, look at everything and download a backup of your data, but nothing can be changed until the owner chooses a plan on the Billing page. Nothing is deleted, and you carry on where you left off as soon as you subscribe.