Why One-Button Checkout Reduced Cart Abandonment by 18% at FlickCart

Tech · 5 min read

FlickCart launched with a conventional multi-step checkout but saw high abandonment on the second screen where users selected delivery windows. With limited engineering bandwidth and a looming funding milestone, product and design prioritized an experiment: collapse the flow into a single, trust-anchored CTA that confirmed address, payment, and delivery in one step.

Designers created a high-fidelity prototype in Figma, then validated it with 12 rapid moderated user sessions and a Hotjar session replay analysis. The new pattern used a persistent summary bar, inline address autofill, and a subtle secondary CTA to edit details. Legal and payments engineers scoped the minimum verbiage required to keep the UX compliant while reducing friction.

Deployed as an A/B test across 20% of traffic for three weeks, the one-button checkout lifted completed orders by 18% and reduced average time-to-purchase by 40 seconds. Post-test learnings included the importance of visible trust marks and editable confirmation inline—small affordances that prevented users from fearing irreversible actions. The team rolled the pattern to 100% and documented a lightweight governance rubric to avoid future creep in checkout complexity.