About Us

watermelonn.app (operated by FusionT4) builds focused, high-quality apps for Shopify merchants. Our mission is to help brands sell with confidence by fixing the small-but-costly gaps in the default storefront experience.

What we build

We design and maintain Shopify apps that install directly into a merchant store, including our swatch and cart-experience products. Each app is built as a modern Theme App Extension, is lightweight, and requires no code changes to the theme.

• Swatch by SKU — shade-accurate variant swatches matched to the SKU rather than the variant name.
• Cart Boost — a high-converting cart drawer with free-shipping progress, upsells and more.

How we work

Merchants purchase a plan on this website and are then guided through installing the app into their Shopify store. Payments are processed securely through our payment partner, and the app is delivered digitally once payment is confirmed.

Get in touch

We are a small, responsive team. For any question, partnership or support request, email us at support@watermelonn.app or visit our Contact page.