You can now allow customers to adjust the quantity of a product at checkout and optionally add a free trial upon signup.
Simply select the relevant options under "Advanced Settings" for your Pricing Page when configuring the payment flow.
This feature enables some great use-cases like offering an Amazon-style free trial (where payment is automatic after X days). Or you can offer a no-card free trial by letting users sign up and only choose a plan after their free trial has ended.
Adjustable Quantity lets you charge per item rather than a fixed subscription fee. Maybe you want to charge per user or per API key, the options are endless.