/docs · 16 guides · 3 apps

Which app are you
looking for?

Setup guides for merchants. Reference for developers. Pick an app to get started.

4 guides

RankRobin

Sales-based collection sorting. Templates, time windows, scheduled updates, seasonal bestsellers.

  • 01 How RankRobin sorts Shopify collections by sales performance
  • 02 Installation Guide
  • 03 RankRobin sort rules: metrics, windows, and cadences for Shopify collections
  • 04 Automatic seasonal bestseller collections in Shopify

Open docs →

7 guides

Simple Split Testing

A/B test storefronts with markup-driven data attributes, sticky assignment, and statistical significance.

  • 01 How Simple Split Testing runs A/B tests on Shopify themes
  • 02 Installation Guide
  • 03 Storefront markup
  • 04 Custom events
  • + 3 more

Open docs →

5 guides

B2B Registration Form & Approval

Wholesale registration and approval. VAT validation, custom fields, Shopify Flow triggers.

  • 01 B2B Registration Form & Approval overview
  • 02 Installation Guide
  • 03 Settings
  • 04 Shopify Flow
  • + 1 more

Open docs →

For developers

Most apps you install.
Culsin apps you build with.

Every app exposes its data through metafields, Flow triggers, signed endpoints, or a documented JavaScript API. Drop in. Extend. Replace the front end if you want to.

register.liquid 
<!-- Your own form, our endpoint -->
<form action="/apps/b2b/register" method="post">
  <input name="email" type="email" required />
  <input name="company" type="text" required />
  <input name="vat" type="text" />
  <button type="submit">Apply</button>
</form>