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# App settings

This section allows you to control how the app works on your store.

1. Product Validation
Go to App settings -> Product validation and configure the following toggles:

* **Validate limits on product page:** When enabled, the app will display a warning message and block the **Add to Cart** button if the customer's selected quantity does not meet your rules.
* **Set default quantity to minimum:** Check this option if you want the product's default quantity to be set to the minimum value of the limit rule when the product page loads
* **Use cart quantity on product page (Experimental):** When checking limits on the product page, the app will count items already in the cart. This prevents customers from bypassing limits by adding the same product multiple times.


![The Product Validation settings in App settings, showing four toggles: Validate limits on product page, Set default quantity to minimum, Use cart quantity on product page (Experimental), and Validate limits on collection page.](https://storage.crisp.chat/users/helpdesk/website/-/8/3/8/3/8383e5404a31c000/anh-man-hinh-2026-04-07-luc-11_tkbyuy.png)


* Validate limits on collection page: Check this option to block **Add to cart** button and display an alert message on the collection page whenever a limit rule is violated.

2. Cart Validation
Go to Cart validation and configure how the app behaves when a customer views their cart.

* **Validate limits on cart page:** Check this option to block **Checkout** button and display an alert message on the cart page whenever a limit rule is violated.
* **Block checkout (Default):** Shows an error message and disables the checkout button if rules are violated, but leaves the quantities unchanged for the customer to fix manually.
* **Auto-adjust quantity:** Automatically changes the item quantity to the nearest valid limit to prevent inventory hoarding and ensure a smooth flow.
* **Enable multiples on cart page:** Applies your quantity step/increment rules (e.g., must buy in multiples of 5) directly within the cart interface.


![The Cart Validation settings showing the "Validate limits on cart page" toggle enabled and three behavior options below it: Block checkout (default), Auto-adjust quantity, and Enable multiples on cart page.](https://storage.crisp.chat/users/helpdesk/website/-/8/3/8/3/8383e5404a31c000/anh-man-hinh-2026-04-07-luc-11_uvw0lh.png)

3. Checkout Validation
Checkout Validation helps block orders at the checkout page when the order violates your limit rules. This feature is especially for stores **that are NOT using Shopify Plus**.

Simply turn the toggle **ON** in App Settings. When the status shows **“Checkout rules status: On”**, the feature is active.

![The Checkout Validation section in App settings showing the toggle switched ON and the status indicator displaying "Checkout rules status: On."](https://storage.crisp.chat/users/helpdesk/website/-/8/3/8/3/8383e5404a31c000/image_x4aqdt.png)

**Important notes:** When this feature is enabled, the app will automatically work across Shopify channels, including: Online Store, Shopify POS, Shop App.

4. Sync product data
Click **Sync Data** to allow the app to fetch the latest product information from your store. We recommend syncing when: add new products, update product variants, limit rules are not applying correctly,... The ensures your rules work with the most up-to-date product data.

![The Sync product data section in App settings with a "Sync Data" button for refreshing the app's product information from the Shopify store.](https://storage.crisp.chat/users/helpdesk/website/-/8/3/8/3/8383e5404a31c000/image_jthqw1.png)

5. Debug Mode - Share Function Logs
If **Checkout Validation** is not working correctly, or customers are still able to purchase restricted products. Please click **Share logs** in the Debug mode section. This will send function logs to our support team so we can check what went wrong and fix the problem faster. 

![The Debug Mode section in App settings with a "Share logs" button for sending Checkout Validation function logs to the Pareto support team.](https://storage.crisp.chat/users/helpdesk/website/-/8/3/8/3/8383e5404a31c000/image_oenlb5.png)