| Limitation | Affects | What to do |
|---|---|---|
| No Shopify POS support | Fixed amount | Use a product-backed mode on any option set published to POS. See POS limitations |
| No stock, so no out-of-stock display | Fixed amount | Use a product-backed mode |
| No SKU, weight, or tax setting | Fixed amount | Use a product-backed mode if any of those matter |
| Does not appear in Shopify product reports | Fixed amount | Use a product-backed mode |
| Generated products are visible to browsing until you exclude them | New product | Exclude the globo-product-options tag from collections and search. Do not unpublish them |
| Generated products do not track stock until you turn it on | New product | Enable tracking and change the inventory policy. See Stock and inventory |
| The link breaks if the product or variant is deleted in Shopify | Existing product | Relink. The app tells you when the target no longer exists |
| Type | Workaround |
|---|---|
| Phone, Email | Put the charge on a Switch beside it |
| Hidden field | Nothing to charge for — the customer makes no choice |
| Date and time picker | Charge for express delivery on a separate Radio button or Switch |
| File upload | Charge a setup fee on a separate Switch |
| Range slider | Use Number, which can drive an add-on quantity |
| Font picker | Charge for a premium font on a separate option |
| Product links | It navigates away — the destination product carries its own price |
| All static types | They collect nothing |
| Behavior | Why it matters |
|---|---|
| Hidden options are not charged | A conditional rule that hides a priced option also removes its charge. This is usually what you want, but make sure to check both branches of the rule. |
| Priced default values charge on page load | The product looks more expensive than advertised before the customer does anything |
| Every selected value is charged on a multi-select | Cap it with Max selections |
| Add-on quantity is per option, not per value | All values in one option scale the same way. Except Mixed quantity, which gives each its own box |
| Duplicating an option set shares its add-on products | Both sets draw down the same stock. See Duplicate and delete |
| Deleting an option set leaves its generated products behind | Tidy them up in Shopify admin if the set is gone for good |
| Formulas cannot subtract | Dimension pricing must be expressed with multiplication, addition, and division. See Dimension add-on formula |
| Negative prices are rejected | You cannot use an add-on to discount the main product |
| Display settings are store-wide | There is no per-option-set control over how prices are shown |
| You want | The right tool |
|---|---|
| A discount when several options are chosen | A Shopify discount, or a bundle app. Add-ons only add |
| A price that goes down | Not possible — negative prices are rejected. Price the base product lower and charge for upgrades instead |
| Tiered pricing — cheaper per unit at volume | Size or quantity bands as separate priced values on a Radio button |
| A minimum order charge | A Shopify setting or app, not an option |
| Different prices for different customers | Two option sets with different prices, split by customer rules |
| Different prices per country | Two option sets split by country rules, or Shopify Markets pricing on the add-on products |
| Add-ons on a subscription | Depends on your subscription app — test before promising it to customers |