UI/UX Design • Mobile App

Square One

A fintech app designed to make money management approachable for younger users.

Square One app mockup

Overview

Problem & Context

Square One is a conceptual fintech app for users aged 16–28, designed to make financial management accessible and engaging.

  • Built as part of the UI Academy program.
  • Focused on a generation navigating money without guidance.
  • Full double-diamond UX process: from user research to a high-fidelity Figma prototype.
  • Every UI decision grounded in UX methodology and validated through research testing.
Role
UX/UI Designer
Program
UI Academy
Tool
Figma (lo-fi wireframes provided)
Year
2026
References
OTP, Erste, Revolut, Wise
Target audience
Urban young adults 16–28 — students & early-career

Process

01 — Empathize

Listening first

I conducted in-depth interviews with 3 users (aged 18–28), all active mobile banking users managing finances daily.

Research goals:

  • What makes a financial app feel welcoming vs. alienating?
  • What friction points do users encounter?
  • What would an ideal experience look like?

Findings were synthesized into an empathy map, surfacing deeper motivations beyond explicit answers — especially around financial confidence and the fear of being judged for not knowing enough.

Empathy map
Key insights:
  • Visual quality and intuitive usability matter more than feature depth.
  • Users want to feel capable, not talked down to.
  • Loyalty programs and instant rewards drive engagement.
  • Financial literacy gaps are common, but curiosity grows when the app feels like a companion, not a teacher.
02 — Define

Structuring the problem

Research findings were synthesized into a structured design framework across three layers.

Personas

Two behavioral personas were developed from interview data and the empathy map: a time-poor young professional with financial awareness, and a financially curious but underinformed student. Grounded in observed patterns, not demographic assumptions.

Dóri persona Kata persona

User Journey

Two complementary journey maps grounded decisions in real behavior: an app-use journey across 5 stages (onboarding, daily tasks, communication) mapping actions, thoughts, pain points, and opportunities; and a monthly financial cycle, from payday optimism to end-of-month panic. Together they revealed the core issue — not a broken screen, but a repeating stress pattern the product should help break.

User journey map
Job statement: “When I'm starting to take control of my finances, I want an app that helps me navigate without shaming or overwhelming me, so I can feel genuinely confident about my own money.”

How Might We:

  • Make financial discovery enjoyable without oversimplifying it?
  • Build emotional resonance into a functional product?
  • Reward financial mindfulness in a way that feels earned, not forced?
03 — Ideate

Giving the app a character

Ideation started with competitive analysis of Revolut, Wise, OTP, and Erste — reviewing UX flows, navigation patterns, and emotional engagement strategies. Mastercard brand guidelines were also integrated.

Key decisions:

  • Kami, the chameleon — introduced as the app's character, mirroring the dark/light mode behavior and adding personality without forcing emotional connection. Togglable by design.
  • Loyalty program — coins gather around Kami as users save, making financial progress tangible and rewarding.
  • Lo-fi wireframes from the program served as structural scaffolding, mapped with UX research decisions.
Wireframe and concept exploration
04 — Prototype

Building in dark & light

The high-fidelity prototype was built in Figma in both dark and light mode. Dark mode is the primary experience, confirmed as preferred by the target demographic. Design system highlights: teal and purple accents drawn from Kami's visual identity, grey card surfaces against a deep blue background, a clean and spacious typography system, and an animated Kami integrated into loyalty flows and onboarding.

05 — Test

Two rounds of feedback

Round 1 — Mentor review (3 mentors): all three supported Kami as a differentiating element; 2 of 3 preferred the togglable version over mandatory presence. Key validation: Kami belongs to the loyalty layer, not the onboarding gate.

Round 2 — Design community feedback: divided on the character, but aligned on one concern — excessive optionality creates complexity. Result: reduced decision points across the interface, with a tighter hierarchy surfacing the most important actions first.

Key learning: the core tension in fintech design is emotional engagement vs. functional simplicity. Kami was resolved as an opt-in warmth layer — present for those who want it, invisible for those who don't. That balance between feeling and function is what Square One is ultimately built around.

Colour Palette

Colours were derived from the character to create a cohesive, emotionally engaging experience. The palette balances playfulness with trust, avoiding overly “corporate” fintech visuals.

#0D0736
#E8FBFC
#99FBFF
#7373FA

Typography & Principles

Space Grotesk

Key numbers & headings — strong visual focus and scannability. “Your money, your way.”

Plus Jakarta Sans

Body text — high readability and a clean, accessible feel.

Clarity over complexity

Every screen shows only what the user needs right now.

Visual before numerical

Charts guide the eye first; numbers are there to confirm.

Trust through transparency

Every transaction is traceable, nothing hidden.

Revolut informed the visual and structural approach; Wise shaped content hierarchy. After mentor feedback, Kami was recalibrated — present and meaningful, but no longer competing with core functionality. The character enriches the experience; it doesn't define it.

Key Screens

Key Screens & Decisions

Onboarding: two onboarding paths support different user preferences — playful guidance or a more traditional experience.

Dark & light: the two modes offer different visual experiences — playful and character-driven, or clean and minimal.

Cards, savings & chat: card management features Kami as a brand element on the card itself; the savings jar makes goal-based saving tangible and motivating; and the chat assistant — powered by Kami — guides users through banking tasks in a friendly, conversational way.