Industry
Family & Home
Services
Redesign & ReplatformConversion Optimization
CastleFlexx had the product, the credibility, and the fan base—but their old site couldn’t keep up. They came to UN/COMMON to streamline the experience, increase AOV, and finally tell the story that pro athletes and doctors were already behind. From a frictionless membership portal to a CRO strategy that fixes what breaks conversions, we turned a stretch tool into a full-funnel brand experience. Now, every click feels intentional, and every page builds trust.
%Increase in MoM Conversions
%Increase in 6-Month YoY Conversions
%Increase in MoM and 92% Increase in YoY Portal Sales
I don’t like our new website, I love it! Working with UN/COMMON was one of the smartest moves we’ve made. After our UX redesign and the buildout of our CastleFit portal, we saw a 15% increase in conversion rate—exactly what we set out to achieve. Our sales have nearly doubled, our margins are better, and we finally have a digital experience that matches the premium quality of our product. The team was thoughtful with our budget, flexible with communication, and delivered on exactly what they promised. They’re not the fastest, but they are precise—and that’s what matters when you want it done right. We’re already planning to hire them again for our next project.
- Dan Castle, Founder of CastleFlexx
More Than Mobility. A Movement in Motion.
CastleFlexx approached UN/COMMON with a bold vision: to revamp the D2C site, streamline the user experience, increase the average order value, and establish enduring brand credibility in a market often saturated with fads. The product was exceptional—endorsed by professional athletes, lauded by medical professionals, and supported by research. However, the website did not effectively communicate this. We completely reimagined the Shopify Plus experience, combining a user-centric design with tools that inform, inspire, and convert. The outcome? A website that not only showcases the product but also motivates users to take action.
A Site That Stretches Further
CastleFlexx had a remarkable product, but the extensive product information on the old website was overwhelming for new customers, particularly those unfamiliar with the science or sizing of the device. We restructured the site layout, simplified the homepage, created dynamic product detail pages with visual FAQs, and incorporated brief educational videos. The key benefits, unique product features, and sizing guidelines are now presented at the most crucial moment: when the user is making a decision.
Conversion That Learns From Behavior
We didn’t just redesign CastleFlexx—we optimized it for smarter selling. Running a CRO program in parallel, our team analyzed traffic patterns, identified conversion funnel obstacles, and diagnosed the customer journey to eliminate guesswork. We introduced custom-built upsell and cross-sell strategies to increase the average order value, fixed a checkout process causing user errors, and implemented better product selection logic based on size, usage type, and customer intent. The result? Increased conversions, reduced customer support requests, and a growing sense of trust.
A Membership Portal That Actually Adds Value
CastleFlexx isn’t just a product—it’s a protocol. To unlock the full value of the device, users need access to on-demand education and ongoing guidance. Enter: the CastleFit membership portal. Our team designed a frictionless portal experience that houses streaming workouts, onboarding flows, and device-specific programs—all under one login. With retention top of mind, the portal delivers lasting utility long after the first purchase.
UGC, Unleashed
CastleFlexx had a treasure trove of athlete shoutouts, real user testimonials, and 5-star reviews buried in blog pages and YouTube links. We brought them forward. With Yotpo integrations, testimonial sliders, and a dedicated “They CastleFlexx” section, we made authentic voices the center of the brand experience. From pro athletes to weekend warriors, the message is clear: this is a product people use—and love.
Core partners
We’re honored to rank in the top 0.2% of Klaviyo partners to achieve Master Elite status globally. It’s a stat we’re super proud of so you can expect our eCommerce marketing services to match.