# Add a post-purchase upsell

Post-purchase upsells come from the **Upsell Booster** app: create the upsell there, then attach it to a product (**Select Upsell**) or to a landing page, and customers see it on your store's **Upsell** page right after they order.

## Steps

1. Install the **Upsell Booster** app from the Apps page. Its menu only appears once it is installed.
2. In Upsell Booster, click **Create New Upsell**, enter an **Upsell Name** and choose the **Product** to offer.
3. Edit the upsell: set its **Status**, configure the **Countdown** (ending time, colours, unit labels, optional **Repeated Countdown every 30 minutes**), write the **Upsell Content**, style the **Confirm** and **Cancel** buttons, and decide on **Variant Matching** and **Show product variants**.
4. Attach it to a product: open **Products → Manage Products**, edit the product and pick the upsell under **Select Upsell** in the settings sidebar.
5. Or attach it to a landing page: in the landing page builder open the gear icon → **landing page Settings** → **Select Upsell** and choose it from the list.
6. To change the look of the upsell page itself, open **Online Store → Theme Settings**, select the **Upsell** page and edit its blocks, including the **Accept** and **Cancel** buttons. **Save** when done.

## Common problems

- **Select Upsell** is missing from the product or landing page settings → the Upsell Booster app is not installed; the option only shows when it is.
- The upsell never appears after an order → check the upsell **Status** is active and that it is attached to the product or landing page the customer ordered from.
- The upsell shows the wrong variant → enable **Variant Matching** or **Show product variants** in the upsell settings.

## Related
- [How does the post-purchase upsell offer work for customers?](https://help.dropify.shop/en/checkout/upsell-offers/)
- [How do I create an upsell offer with Upsell Booster?](https://help.dropify.shop/en/marketing_email_sms/upsell-booster/)
- [Customize the thank-you (order completed) page](https://help.dropify.shop/en/guides/customize-the-thank-you-page/)
- [Add a quantity offer (bundle) to a product or landing page](https://help.dropify.shop/en/guides/add-a-quantity-offer-or-bundle-to-a-product-or-landing-page/)