Let customers build their own bundle and watch AOV climb.

Guide shoppers through a multi-step flow that only shows products compatible with what they have already chosen.
Set thresholds like buy 3 save 15% and the price updates in the builder as items are added.
Ships as a theme app extension, so it inherits your typography and colours instead of fighting them.
The whole flow runs client side against the Storefront API and adds a single line item to the cart.
Bundle apps on the app store fall into two camps: fast but ugly, or configurable but slow. Most render in an iframe that ignores your theme entirely and adds half a second to every product page.
Routine Bundle Builder ships as a theme app extension. It reads your theme settings for typography, radius, and colour, and it only loads on the templates you enable it for.
Skincare brands use it for routines. Supplement brands use it for stacks. Coffee roasters use it for a three-bag subscription with a rotating third slot. The shape of the flow is configurable — steps, rules about which products can appear together, and how the discount scales.
Install, pick the products that can appear in each step, set your discount tiers, and add the block to your product or landing page template. Most stores are live in under twenty minutes.


Cart & CheckoutThe cart drawer that loads before your theme does
A fast, fully customisable slide-out cart drawer for Shopify, with a rewards progress bar, upsells, add-ons and discount codes built in. No theme code, and every feature on every plan.
PerformanceSee exactly which app is costing you conversions.
Continuous Core Web Vitals monitoring for Shopify that attributes every millisecond of load time to the app or script responsible.
InventoryTurn out-of-stock pages into a waiting list that converts.
Back-in-stock alerts with demand forecasting, so you know what to reorder and how much of it before the restock email goes out.