Custom PC builder for Shopify — sell configurable products the right way

Configurable and bundle products are one of the hardest problems in Shopify development. Our PC Builder app was built to solve this without the performance cost of most existing solutions.

The standard Shopify variant system supports up to 100 variants per product with up to 3 options. For products with more configuration options than this — computers, custom bundles, build-your-own kits — you need a different approach.

The PC Builder app stores configuration data in metafields and uses a custom Storefront API integration to handle the cart and pricing logic. This means: no page reload when the user changes configuration, real-time price updates, and compatibility logic that prevents invalid combinations.

For fashion applications, the same technology applies to: custom suit builders with fabric, lining, and button selection; bespoke shoe configurators; or bundle builders for gifting (choose top, bottom, and accessory as a set).

Performance is the key differentiator. Most configurator apps work by loading a large JavaScript bundle and communicating with a remote server on every interaction. Our approach loads configuration data as JSON on page load and handles all logic client-side. The result is a configurator that feels instantaneous.

The app is available on the Shopify App Store. If you have a product configuration use case that does not fit the standard Shopify variant model, it is worth reviewing.