---
title: "Set up purchases"
description: "Assign products to screens, add product elements, and connect a purchase button in the Flow Builder."
---

To set up purchases on a screen, add a purchase button and configure its **Purchase** action. The action can target a specific product or whichever product the user selects from a Products element on the screen.

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## Add products

A product element is a visual card that displays a product on the canvas.

To add a product element:

1. On the canvas, click **+** on the target screen.
2. Select **Products**.
3. Choose a layout preset: vertical list, horizontal list, feature carousel, feature cards, banner list, or bottom sheet.

   

4. Select each product card and assign it a product in the dropdown in the **Design** panel.

   :::important
   A product element without an attached product [blocks previewing and publishing](builder-save-publish#troubleshooting). Assign a product or delete the element.
   :::

   

To show a crossed-out anchor price on a card, add an [Old Price element](onboarding-text#add-an-old-price) inside it.

:::note
You can also attach a **Purchase** action directly to a product card's **On tap** interaction. Tapping the card then triggers the purchase, with no need for a separate purchase button.
:::

:::important
If you delete a product group and replace it with a new one, check that every action and variable targets the new group. References left pointing to the deleted group [block previewing and publishing](builder-save-publish#troubleshooting).
:::

## Add a purchase button

A purchase button triggers a **Purchase** action when the user taps it.

To add a purchase button:

1. On the canvas, click **+** on the screen.
2. Select **Button** and choose a button preset.
3. With the button selected, open the **Interactions** tab in the right panel.
4. Click **Add trigger** > **On tap**, then click **Add action**.
5. Set **Action** to **Purchase**, then set **Product** to one of:
   - `products.selectedProduct`: Buys whichever product the user has selected from a Products element on the screen.
   - A specific product: Always buys that product, regardless of any selection on the screen.

### Show the price on the button

To insert the selected product's price into the button label, use a variable:

1. With the button selected, open the **Design** tab in the right panel.
2. In the **Content** field, place the cursor where the price should appear.
3. Click the variable icon, pick `products.selectedProduct`, then pick the `prod_price` attribute. The full variable resolves to `products.selectedProduct.prod_price`.
4. Add static text around the variable — for example, `Subscribe for {prod_price}`.

The label updates as the user selects different products.

## Restore purchases

To let users restore previous purchases, add a restore button or link to the screen.

To add a restore purchases element:

1. On the canvas, click **+** on the screen.
2. Select **Button**, then choose **Links** for a text link or any other button type for a styled button.

3. With the element selected, open the **Interactions** tab in the right panel and click **Add trigger**.
4. Select **On tap** and click **Add action**.
5. From the **Action** dropdown, select **Restore purchases**.

## Display additional elements based on the selected product

If a screen has products on it, you can show or hide other elements depending on which product the user selects.

To set up conditional visibility:

1. In the **Products** element, select a product card.
2. Open the **Interactions** tab in the right panel and click **Add trigger**.

3. Select **On tap** and click **Add action**.
4. From the **Action** dropdown, select **Show** or **Hide**.
5. Select the element to show or hide when that product is selected.

## Review products in flow

The **Products** panel in the left sidebar maps existing products to each screen in the flow.

Each screen has two sections:

- **Default** — one product, pre-selected when the screen loads.
- **Other** — additional products available on the same screen.