What it looks like

1. Staff tap Gift registry to open Listify, and close straight back to the till when they are done. Put the tile high on the grid: it scrolls, and anything below the fold gets forgotten. On a plan without in-store registries the tile reads Needs the Pro plan instead.

1. Ring everything up first, then open Listify. Staff type the couple's name, or scan the QR code straight off the guest's phone, which is quicker and saves spelling a surname across a counter.

2. Matches appear from the third letter. Each row shows the registry, who it belongs to, the occasion and the date, so staff can confirm they have the right one without asking the guest to prove anything.

3. The gifts are already rung up, so the cart comes first. Every line says what will happen to it, and one tap tags all the lines that match this list. A line already on someone else's registry is left alone and says so, and anything unrelated, like the guest's own shopping, stays out of the way. What the couple still need sits underneath.

4. Tagged lines are marked on the spot, and they are recorded on the registry when the sale completes. The list below now shows what is already in the cart, so nobody adds a second one by mistake. Done closes Listify and drops back to the POS home screen.

5. Open the registry before anything is rung up and the list leads instead, still-needed first and already-gifted last. Add puts the item into the sale already tagged to this registry, and the row then says it is in the cart.

6. Where the guest picks the option, like a gift card amount or a colour, the button says Choose. Staff tap the option the guest wants and that exact one goes into the sale, tagged, so nothing reaches the cart that nobody chose.

1. Staff tap the line in the cart. Listify sits in the menu POS already shows there, so there is nothing new to remember.

2. The same search as before. The item being tagged is named at the top, so nothing on screen repeats what the clerk just tapped.

3. If the line is already on a registry, staff are told which one before they change anything. Choosing another moves it; Remove takes it off entirely.

4. Confirmed, and back to the till. Staff can attach any line this way, including something bought off-list as a gift, which is the case a strict match would miss.

1. Open the product, by scanning it or searching POS for it. Buying for a registry is one more option on the menu POS already shows, so there is nothing new to remember.

2. The item appears first, so staff can confirm they have the right variant while every registry in the shop is checked against it. POS draws its own progress bar, and it sits centred under the item.

3. Two registries have this exact item on their list. One tap adds it to the sale already tagged to that registry and closes back to the till, so nobody spells a surname across a counter.

4. Nothing on any list matches. Staff get a plain answer instead of an empty screen, and there is no search box to puzzle over, because there is nothing to narrow.

5. The way out when the guest says it is a gift anyway. Searching by name does the same thing as before: the item goes into the sale tagged to that registry. Buying something off the list is an ordinary gift, and it lands on the registrant's orders like any other.

1. Once the sale is recorded on a registry, the receipt screen says so. Staff can tell a guest their gift is on the list without opening anything. A sale with no registry gift shows nothing extra, and if Shopify reports a sale a few seconds late the block simply does not appear: the registry still updates on its own.

1. A scan that matches exactly one registry opens it straight away, with no confirming tap. Hardware and counter-mounted scanners work the same way as the camera.