All work
Lumen Bank
2026
Redesigning everyday banking for two million customers, from the first sign-up screen to the monthly budget.
Client
Lumen Bank
Services
Product design, iOS · Android, Design system
Timeline
9 months
Team
2 designers, 6 engineers
01 — The challenge
Where we started.
Lumen’s app had grown feature by feature for eight years. Customers could do almost anything, but the things they did every day were buried three taps deep, and app-store reviews had settled at 3.9.
The brief was simple to say and hard to do: keep every feature, make the everyday ones effortless, and do it without retraining two million people.
02 — The process
Listen
Thirty customer interviews and a month of support tickets showed that five tasks made up 80% of all sessions.
Rebuild the home
Balance, recent payments and the monthly budget moved onto one calm screen. Everything else sits one swipe away.
Ship in slices
New screens rolled out to 5% of customers each week, guided by real usage instead of a big-bang launch.
03 — The results
app-store rating, up from 3.9
fewer support tickets
monthly active customers
Ana Costa
Head of Product, Lumen Bank
Next project
Roasted in Lisbon, sold everywhere
