Case Study: Rewriting FitKit's Checkout Flow for Less Dropoff and Faster Purchases

Tech · 6 min read

FitKit observed a 24% cart abandonment rate concentrated on the payment page. Session replay and heatmap analysis showed that mobile users were getting lost between shipping, discounts, and payment forms — compounded by slow rendering of a third-party payment iframe. User interviews confirmed confusion over coupon placement and unclear error states.

Designers consolidated shipping and payment into a single scrollable screen, moved coupon entry inline with order summary, optimized form fields for mobile keyboards, and replaced the iframe with a native, PCI-compliant SDK to reduce load time. They introduced real-time field validation and summary accordions so users could scan content without leaving the page.

A controlled rollout using feature toggles showed a 18% reduction in checkout abandonment and a median checkout time drop from 2:10 to 1:22 on mobile. The rewrite also reduced help-desk tickets related to checkout by 31%. FitKit balanced the engineering cost by doing the redesign in modular components and keeping the old flow behind a toggle for quick rollback.