Docs/Summer Upsell/Introduction

Getting started

Introduction

Summer Upsell is a full-funnel upsell & cross-sell app for Shopify. It ships ten widget types — from product-page bundles to post-purchase offers — and a flat-pricing plan that doesn't scale with your revenue.

What's included

  • 10 widget types across product page, cart, checkout, popup, and post-purchase surfaces.
  • AI recommendations — rule-based Basic AI (related / complementary) and credit-based Summer AI powered by ChatGPT.
  • Shopify-native discounts via Shopify Functions — no fake discount codes, no checkout hacks.
  • Multi-language — per-locale overrides for widget title and button text across 6 built-in locales.
  • Detailed analytics — impressions, conversions, revenue, AOV lift per campaign, plus year-over-year comparison.
  • Auto-rotate non-performing campaigns (Pro plan).

The 10 widget types

Field Type Description
Upsell PDP Single Upgrade, Tier Comparison, or Inline Banner — targeted upsells next to the buy button.
Cross-sell PDP Grid, Stack, or Carousel layout — cross-sell recommendations below the description.
Frequently Bought Together PDP Classic FBT list with checkboxes and one-click bundle Add.
FBT (Full Width) PDP Horizontal carousel laid out across the full content width in an editorial style.
Bundle (Amazon FBT) PDP Amazon-style image strip — trigger product + bundle products joined with +.
Popup PDP Modal fired after Add-to-Cart. Cross-sell, FBT, or Add-ons layout.
Product Add-on PDP Add-on picker (List, Card, or Toggle) for warranties, gift wrap, samples.
In-Cart Upsell Cart Inline upsell rendered inside the cart drawer or page.
Cart Popup Cart Modal fired on Checkout click — cross-sell, FBT, or Add-ons layout.
Post-Purchase Thank-you Block on the order status page that adds items to the existing order.

What it looks like on the storefront

Every widget renders inside your own theme, using your fonts and colors — there's no Summer-branded frame around it. These are real previews of the same widget in three different placements.

Amazon-style Frequently Bought Together strip on a product page, showing the trigger product joined to three complements with + signs and a combined add button
Product page — Frequently Bought Together, rendered directly under the buy button.
In-cart upsell recommendation shown inside the cart drawer between the line items and the checkout button
Cart — an in-cart recommendation sits between the line items and the Checkout button.
Post-purchase offer on the thank-you page with a discount countdown, product checkboxes, and an add-to-order button
Thank-you page — a post-purchase offer that adds to the order the customer just paid for.

Mobile

Every layout is responsive. Grids collapse to a single column, carousels become swipeable, and popups take over the full width with a large dismiss target.

Cross-sell grid on a mobile product page collapsed to a single column
Cross-sell on mobile
Cross-sell popup on mobile taking the full screen width after add to cart
Popup on mobile
In-cart upsell on a mobile cart drawer
In-cart on mobile

How it works

  1. Install the app from the Shopify App Store.
  2. Enable the Summer Upsell app embed in your active theme — one toggle, done once.
  3. Create a campaign in the admin — pick a placement, widget, trigger, and upsell source.
  4. Add the matching theme block (e.g. ✨ Summer: FBT Bundle) to the page where you want it to render. Post-purchase is the exception: it installs from Settings → Checkout → Customize instead.
  5. Publish — the storefront script picks up the campaign automatically.

Compatibility

  • Shopify Online Store 2.0 themes (Dawn, Sense, Crave, Studio, Refresh, and most third-party 2.0 themes).
  • Shopify Plus and standard Shopify plans.
  • Multi-language stores via the Shopify Markets / Translate & Adapt locale system.

Next

Installation