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Watch it work
One walkthrough, both sides of the story: building a lock as the merchant, then running into it as a shopper. Real store, real timing, nothing sped up.
The half that's yours
The first half happens entirely in your Shopify admin. If you can build a discount code, you can build a lock. There's no theme code to touch and nothing to paste anywhere.
The half that's theirs
Your customers never see the app. They see your store, with a price that's waiting on a code or a yes from you. No account to make, no plugin, no separate site to visit.
Rather read than watch?
How it works walks the same ground in writing, and the FAQ covers the questions the video can't: theme compatibility, what happens during an outage, and where your data lives. If your store has a wrinkle neither one answers, tell us about it and we'll answer ourselves.
Would rather have the file? Download the walkthrough (MP4, 2 min 27 sec).