A seven-day sprint to help NGO Arredondar engage new retailers through a focused landing page, website CTA, and an onboarding flow rooted in real user research.
Arredondar helps shoppers donate the cents left over from purchases, turning tiny moments into meaningful contributions for partner NGOs.
The challenge wasn't the donation model itself. People understood and liked the idea. The friction came from explaining it clearly to retailers interested in joining the initiative.
As part of a seven-day Tera UX bootcamp sprint, our team received a straightforward challenge: create an experience that helps retailers understand, trust and join the movement.
Seven days. Five people. One real client.
Competitors were loudly asking for action. Arredondar was asking quietly — and people weren't hearing it.
We started with a CSD matrix and continuously updated it throughout the week as assumptions evolved into findings.
Benchmark analysis revealed a pattern almost immediately: donation platforms consistently placed strong calls to action at the center of the experience. Arredondar barely highlighted theirs.
Research validated the opportunity. Survey results showed that 49% preferred donation through rounding-up mechanics, and 89% felt comfortable donating up to R$0.99 per purchase. Interviews with entrepreneurs and retailers uncovered the bigger issue: uncertainty around onboarding and lack of clarity during the process.
The problem wasn't willingness. It was confidence.
Rebuilding the entire experience would have been ideal, but the timeline forced prioritization.
Instead, we focused on creating an MVP that solved the highest-friction moments: a stronger homepage CTA directing users into a dedicated landing page, a simplified onboarding experience, removal of long forms in favor of quick lead capture, and CRM automation handling later-stage onboarding.
Testing surfaced friction around scroll behavior and form complexity, which led to additional simplification. The experience became less about collecting information and more about creating momentum.
Outcomes ✦ The Numbers
What the system unlocked — for users, for teams, and for the brand — after launch.
Research validated strong interest in the model.
Behavior aligned with the platform proposition.
Research, synthesis, prototyping, testing and delivery compressed into one sprint.
What’s Next ✦ Beyond the MVP
With more runway, three parallel tracks would compound engagement for retailers and end consumers alike.
Expand awareness beyond retailers and educate end consumers.
Provide partners with impact visibility and communication tools.
Create integrations allowing retailers to connect donation flows faster.
The Team
Gratitude to the cross-functional crew that made this one real — and to the testers who kept us honest.