Sidekick: Add Cart Upsell Popup

Help me add an upsell popup that appears when customers add items to their cart, without custom theme code:

Store name: [YOUR STORE NAME]
Budget: [BUDGET]
Priority: [PRIORITY - e.g. cheapest plan / mobile bottom-sheet design / once-per-session frequency capping / in-stock filtering]
Trigger product(s): [TRIGGER PRODUCT]
Products to upsell: [UPSELL PRODUCT 1], [UPSELL PRODUCT 2]

Do the following:


  App comparison - Compare 2-3 top Shopify App Store apps for add-to-cart upsell popups (e.g. Aftersell Post Purchase Upsell, Vitals, ReConvert Upsell & Cross Sell). For each, list pricing tier and feature coverage: popup trigger rules, once-per-session capping, mobile bottom-sheet vs. modal display, and impression/click/dismissal analytics.
  Recommendation - Recommend the top pick given my [BUDGET] and [PRIORITY].
  Install - Initiate installation of the recommended app from the Shopify App Store.
  Confirm & next steps - Confirm the install completed and summarize what to configure inside that app: the popup rule so adding “[TRIGGER PRODUCT]” to cart offers [UPSELL PRODUCT 1] and [UPSELL PRODUCT 2] (with a “[DISCOUNT]% off when bundled” offer if supported), a heading like “[POPUP HEADING]”, styling with [PRIMARY COLOR]/[SECONDARY COLOR], and a max of [MAX ITEMS] products shown per popup.


Note: popup copy, frequency capping, in-stock filtering, and analytics tracking are configured inside the installed app’s own dashboard, not in Shopify admin theme code.