Case Study Nu Bank Product Design

Folio

A calmer personal-finance app for the people who avoid their money — designed to replace shame and overwhelm with clarity, starting from a single honest number.

OutcomeEstablished an anxiety-aware pattern library — progressive disclosure, no red for spending — that shaped the build.

Folio personal finance app shown on real devices in a calm desk setting, with a balance dashboard, account list, recent activity, and gentle spending insight.
Role
Product Designer
Agency
Symmetri
Client
Nu Bank · Consumer Fintech
Scope
Research → IA → Product Design
Status
Delivered

The Challenge

Most personal-finance apps are built for people who already enjoy thinking about money. They reward obsessive categorization and assume the user's problem is a lack of information. But the person who most needs clarity isn't underserved by data — they're overwhelmed by it. They avoid opening their banking app because they're afraid of what they'll see.

My client wanted to build for exactly those users — an app that lowers the emotional cost of financial awareness. I led product design from research through a build-ready screen system for iOS and Android.

  • Generative Research
  • Diary Study
  • Content & Tone
  • Product Design
  • Design System

Research

Eleven in-depth interviews and an eight-person diary study, over six weeks — opening each session with life context before money came up, to lower the performance anxiety that skews finance research.

9/11
deleted a finance app in the past year
8/11
described checking money as “scary”
4.2 wk
average time between app opens
100%
abandoned at least two finance apps

What I Designed

A single-number balance view that opens the app — calm, unadorned, no color-coded judgment. A weekly Spend Pulse that reports without grading ("you spent $X; your average is $Y"). Gentle, opt-in nudges that are warm rather than urgent. A Savings Pocket that's a mental model, not another account. And a private Clarity Score — a gentle mirror, not a grade.

Amber signals attention; red is reserved for genuine account problems, never for spending. The whole system reveals itself progressively, so the users who need it most aren't asked to set up a budget before they've seen any value.

Screens

The full case study, one thumb at a time. Onboarding earns the right to show more; the home screen is a single uncolored number; attention states use amber, never red; and every reveal is calm before it is informative.

Step 1 of 3 — Welcome

𝑭
A calm place for your finances.
No charts. No budget alerts. No judgment. Just a clear, honest look at where you are.
What should we call you?

Step 2 of 3 — Comfort

Before we look at numbers...
What would feel like a comfortable balance to have? Even a rough guess is fine — this helps us know when to give you a gentle heads up.
I feel okay when I have at least...
You can change this anytime in settings

Step 3 of 3 — Connect

One last thing.
To show you your balance, we connect to your bank through Plaid — the same secure system used by thousands of apps.
 We can see your balance
 We can see recent transactions
 We cannot move money
 We cannot see your login
Welcome & Onboarding

The most important flow in Folio. Sofia has tried four other finance apps and deleted them all. This one has 90 seconds to earn her trust. Value before effort — a real balance before any setup requirements.

Home — Calm State

9:41
Morning, Keiko.
Your balance
$8,240
Updated just now
Across 2 accounts
Recent See all →
Whole Foods
Today
−$64.20
Blue Bottle Coffee
Yesterday
−$6.50
Direct Deposit
Mon, Dec 2
+$3,240
Rent — Dec
Mon, Dec 1
−$1,800
Netflix
Nov 30
−$15.49
Home
Pulse
Pocket
You
Balance Hero — Home Screen

The screen Sofia sees every time she opens Folio. One number. Calm. Non-judgmental. The design must work whether the news is good or bad — it is never the app's job to tell her how to feel about her balance.

Amber Alert State

9:41
Hi, Sofia.
Your balance
$380
Updated 12 minutes ago
A bit lower than usual
Your balance is below the $500 you said would feel comfortable. It happens — just useful to know.
See what's been spent →
Something looks a bit different
A $142 charge from "SVCS 8841 LLC" is larger than your usual spending at this type of merchant.
Does this look familiar? →
Recent
?
SVCS 8841 LLC
Yesterday · Unusual
−$142.00
Uber
2 days ago
−$22.40
Home
Pulse
Pocket
You
Attention Needed — Amber State

Sofia's balance has dropped below her comfort threshold ($500). This is the moment that most finance apps get catastrophically wrong — the red alarm, the budget warning. Folio's version is warm, factual, and gives Sofia a clear next step without creating a crisis.

Pulse — Weekly View

9:41

Your Pulse

Your spending rhythm
This week
$642 spent so far
Your average week is around $710. You're a little under.
Last 4 weeks
This wk
$642
Nov 25
$718
Nov 18
$484
Nov 11
$771
Your 4-week average $654 / week
Where it went this week
Groceries & food $241
Getting around $88
Going out $174
+ 8 other categories $139
Home
Pulse
Pocket
You
Spend Pulse

Not a budget. Not a category breakdown. Just: this week you spent $X. Your average is $Y. A gentle rhythm — the financial equivalent of knowing whether you've been sleeping more or less than usual.

Pocket — Current State

9:41

Your Pocket

Setting things aside
New laptop
$150
Set aside · started Dec 3
How your Pocket works
This isn't a real account — it's just a way to think about money you're setting aside. Nothing moves automatically. You're in control.
Home
Pulse
Pocket
You

Add to Pocket Flow

9:41

Add to Pocket

How much do you want to set aside for your new laptop?
$150
Your balance: $3,840
1
2
3
4
5
6
7
8
9
.
0
Savings Pocket

The mental model savings feature. Not a real account. Not a goal tracker. Just a calm visual space to set something aside in your mind. Marcus sets aside $150 for a new laptop. No fanfare. Just: acknowledged.

Insights Screen

9:41

Insights

A quiet look at your patterns
Your clarity this week
M
T
W
T
F
S
S
"Five days this week, you had a clear picture of your finances."
What we've noticed
You tend to spend more on weekends than weekdays — about 40% of your weekly spending happens Saturday and Sunday.
Spending rhythm
Your grocery spending has been pretty steady over the past two months — around $180 most weeks.
Consistent
The first week of the month is usually your biggest spending week — often by $200 or more.
Monthly pattern
Home
Pulse
Pocket
You
Insights & Clarity Score

Revealed after 8 weeks. The most personal screen in Folio. A private mirror — not a report card. The Clarity Score asks one question: how many days this week did you have a clear picture of your finances? No comparison to others. No judgment if the answer is 2.

Outcome

  • Delivered a build-ready product design for iOS and Android — research, flows, screens, and a content-and-tone system — handed to engineering.
  • Reframed the product around a single honest number, letting users get value before any setup.
  • Made tone a first-class design material, with a written system for warm, non-judgmental copy.
  • Established an anxiety-aware pattern library — progressive disclosure, no red for spending — that shaped the build.