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SB DigitalAgency
App Development

Mobile App UI/UX Design That People Actually Finish Using

Research, flows and interfaces designed for thumbs, interruptions and real-world conditions.

App UI/UX Design

Mobile users are distracted, interrupted and impatient. A flow that takes four screens on desktop may need two on mobile; a form that works on a laptop may be unusable one-handed on a bus. Mobile design is a different discipline and we treat it as one.

We design from the flow outward: map the job the user is trying to complete, remove every unnecessary step, then design screens that work with one thumb, in poor light, on a cracked screen, with intermittent connectivity.

Deliverables include a component library that developers can build from, plus prototypes tested with real users before development begins — where fixing a problem costs a Figma edit rather than a sprint.

+47%
Onboarding completion
+38%
Task completion
+22%
Day-7 retention

+47%

Onboarding completion improvement

The problems we fix

  • Desktop design squeezed into a phone

    Dense tables, small tap targets and multi-column layouts produce an app that feels like a shrunken website.

  • Onboarding that users abandon

    Long sign-up flows before any value is delivered lose most new users in the first session.

  • No accessibility consideration

    Low contrast, unlabelled icons and text-only colour cues exclude users and fail store review criteria.

How we fix them

  • Flow-first design

    Map the core job to be done, then design the shortest path to completing it.

  • Value-first onboarding

    Let users experience the product before asking for an account; defer registration with progressive profiling.

  • WCAG-compliant mobile patterns

    44px minimum targets, contrast ratios, screen-reader labels and non-colour status indicators.

Deliverables

What App UI/UX Design includes

What you actually get

  • User research: interviews, competitor teardown, analytics review
  • User flows and information architecture
  • Low-fidelity wireframes for all core screens
  • Design system: colour, type, spacing, components, states
  • High-fidelity UI for iOS and Android conventions
  • Interactive prototype and usability testing round
  • Design tokens exported for developer handoff
  • Accessibility annotations and dark-mode variants

Tools & platforms

  • Figma
  • Maze
  • Miro
  • Principle
  • Lottie
  • Zeroheight
Process

How we deliver it

  1. 01

    Research

    Understand the user, the job and the environment they use the app in.

    Week 1

  2. 02

    Flows

    Map journeys and remove unnecessary steps before any visual design.

    Week 1–2

  3. 03

    UI design

    Design system and high-fidelity screens with all interaction states.

    Week 2–4

  4. 04

    Prototype & test

    Build a prototype, test with users, fix observed friction.

    Week 4–5

  5. 05

    Handoff

    Tokens, specs, assets and a walkthrough session with developers.

    Week 5

FAQ

App UI/UX Design — common questions

Discuss your app ui/ux design project

Book a free 30-minute consultation and get a written plan — whether or not you work with us.