Help finding specific build-a-box or builder app for multi-step user experience

Hello, can anyone help me determine what build-a-box or page builder was used to create this flow: https://www.getfussy.com/pages/subscribe

I found this website by browsing Shopify’s blog here: https://www.shopify.com/za/blog/checkout-process-optimization#1 (#11)

Any help is greatly appreciated!

Hi @poopbagclub Checked out the links you shared but I think they’ve since been changed. If you’re looking to add a Build a Box feature where customers can pay for items but hold on shipping them, our app does exactly that! Bry’s comics for example used our app to launch their Build a Box feature (see here https://www.youtube.com/watch?v=pcKcsJv42ao) You can try us out for free 30 days Addora ‑ Buy Now Ship Later - Buy now, ship later. Combine orders into one delivery | Shopify App Store

If you’re still looking for a Shopify app for this type of Build-a-Box experience, Utterbond could be another option to consider. It supports Build-a-Box functionality along with subscriptions, allowing customers to choose products and set up recurring purchases. The exact setup would depend on the flow you’re trying to recreate, but it may be worth checking if you need both customizable boxes and subscription options.

This page looks like a custom page built by a developer. I’ve checked the page style and the classes are attached to the theme but not an app.