The Free plan gives you one active Site lock at a time, with the default lock screen — no custom message, no product or collection locks, no scheduling. It’s a good way to try Launch Day before upgrading.
The Paid plan removes the one-lock limit and unlocks every feature: Product and Collection locks, scheduled unlocks, custom lock screen text, hiding the Buy button instead of a full lock screen, and keeping locked products out of Google Shopping.
From the Plan page in Launch Day, click Upgrade plan. You’ll be taken to Shopify’s own billing page to choose and confirm your plan — Launch Day never handles your payment details directly, Shopify does.