Reference

Theme app blocks

Summer Upsell ships one app embed and ten theme app blocks. The app embed must be enabled for any widget to render.

Field	Type	Description
Summer Upsell (app embed)	App embeds	Required for every widget — enable it once under App embeds in the theme editor.
✨ Summer: Upsell	Product page	Renders Single upgrade / Tier comparison / Inline banner campaigns.
✨ Summer: Cross-sell	Product page	Renders Cross-sell Grid / Stack / Carousel campaigns.
✨ Summer: FBT Bundle	Product page	Renders Classic FBT campaigns.
✨ Summer: FBT FullWidth	Product page	Renders FBT Full Width campaigns.
✨ Summer: Bundle FBT	Product page	Renders Amazon-style Bundle campaigns.
✨ Summer: Popup Upsell	Product page	Invisible container that lets Popup campaigns open on Add to cart.
✨ Summer: Product Add-on	Product page	Renders Product Add-on List / Card / Toggle campaigns.
✨ Summer: In-Cart Upsell	Cart page	Renders the in-cart widget under the cart line items.
Summer: Cart Popup	App embeds (optional)	Not needed on most themes — the Cart Popup hooks the Checkout button through the main app embed. Turn this on only if your theme's Checkout button isn't detected.
Summer: Post-Purchase	Legacy	Older theme block kept for compatibility. Current stores use the checkout editor block below instead.

Blocks are added through Online Store → Themes → Customize → Add block. Blocks have no settings of their own — the campaign configuration in the app drives everything.

Outside the theme editor

Field	Type	Description
Summer: Post-Purchase Block	Checkout editor	Added on the Thank you and Order status pages from Settings → Checkout → Customize. See Post-purchase upsell.
Automatic discounts	Shopify admin → Discounts	Created per campaign when you enable a discount; nothing to add or configure in the theme. See Discounts.

Permissions & data

Publish checks