App UI/UX Design That Starts With Users and Ends With Buildable Specs

What Our App UI/UX Design Service Covers

We design new products from scratch, redesign apps that have outgrown their original structure, and create design systems for teams that ship across several platforms. The work can stand alone, with your engineers building it, or feed directly into our mobile app development team for a single accountable delivery.

• UX research: stakeholder interviews, user interviews, surveys, analytics and support-ticket review.
• Information architecture: navigation models, content hierarchy and naming.
• Interaction design: user flows, wireframes, states, gestures and motion.
• Visual design: typography, color, iconography and illustration direction.
• Prototyping and usability testing, moderated and unmoderated.
• Design systems and developer handoff.

User Research That Changes Decisions

Research is only useful if it changes what gets built. We scope research to the decisions in front of you, recruit participants who match your real users, and report findings as prioritized changes rather than long slide decks.

Five to eight participants per round typically surface the most serious usability problems in a flow. We test early and in rounds rather than once at the end, because a finding is cheapest to act on while the design is still in Figma.

From Flows to Interface: How the Design Takes Shape

We move from coarse to fine on purpose. User flows and low-fidelity wireframes come first, because arguing about button colors before the navigation model is settled wastes everyone's time. Visual design starts once the structure has survived at least one round of testing.

1. Map jobs and flows: list the jobs users hire the app for and draw the shortest path through each one, including entry points from notifications and deep links.
2. Wireframe key screens: grayscale layouts focused on hierarchy, content and controls, reviewed with stakeholders and engineers together.
3. Prototype and test: a clickable prototype of the riskiest flows, tested with target users and revised.
4. Visual direction: two or three directions explored on a few representative screens, then one chosen and extended.
5. Full UI and states: every screen designed with its loading, empty, error and offline states.

Mobile details that decide how an app feels

• Thumb reach on large phones, with primary actions in the lower half of the screen.
• Permission requests timed to the moment a feature needs them, with a pre-prompt that explains why.
• Skeleton screens and optimistic updates so slow networks do not feel broken.
• Haptics and motion used to confirm actions, kept subtle and respectful of reduced-motion settings.
• Forms that use the right keyboard types, autofill hints and passkey support to reduce typing.

Design Systems Your Engineers Can Build From

A design system is a shared language between design and code. We start with design tokens for color, type, spacing, radius and elevation, then build components with every state documented: default, hover, focused, pressed, disabled, loading, error and empty. Tokens are exported in a format engineers can consume directly, which keeps Figma and the codebase from drifting apart.

• Figma libraries with variables, variants and auto layout that mirror component props.
• Light and dark themes defined through semantic tokens, not duplicated screens.
• Platform adaptations where iOS and Android conventions differ, such as navigation and date pickers.
• Usage guidance and content rules so new screens stay consistent after handover.

When the app is built in a shared codebase such as React Native, we align component names and props with the code so a designer and an engineer can point at the same thing.

Accessibility to WCAG 2.2

Accessible design is easier and cheaper when it is planned from the first wireframe. We design to WCAG 2.2 Level AA, which many US organizations use as their benchmark for ADA-related risk and procurement requirements, and we test with VoiceOver and TalkBack rather than relying on automated checkers alone.

• Text contrast of at least 4.5:1, and 3:1 for large text and essential UI components.
• Target sizes of at least 24 by 24 CSS pixels per WCAG 2.2, and the larger 44pt and 48dp platform guidance for primary controls.
• Visible focus indicators that are not hidden by sticky headers or overlays.
• Alternatives to drag gestures, such as buttons for reordering or sliders.
• Support for Dynamic Type and Android font scaling without truncating critical content.
• Accessible authentication that does not depend on memorizing or transcribing codes when alternatives such as passkeys or paste are possible.

Accessibility also affects content and engineering. We write meaningful labels for icon-only buttons, define the reading order for screen readers on complex layouts, and specify how custom components should expose their role and state to assistive technology. Those annotations go into the design file so engineers do not have to guess, and we include accessibility checks in design QA alongside visual review.

The payoff is broader than compliance. Clear contrast, larger targets and predictable focus order help people using a phone one-handed on a bus or in bright sunlight, which describes a large share of real mobile usage.

Handoff, Build Support and Design QA

Designs fail at handoff when edge cases are missing. Every flow we deliver includes empty, loading, error, offline and permission-denied states, along with copy for each. We annotate behavior that a static frame cannot show, such as what happens on pull to refresh or when a long name wraps.

During development we review builds against the design, log visual and interaction issues, and adjust the design where technical constraints call for it. That collaboration is part of how we deliver projects end to end.

Timelines and Investment

Design usually accounts for roughly 10–15% of a full app budget. Our mobile app development cost guide shows how design fits alongside engineering, QA and launch. If you already have an app with usability issues, a UX audit is often the quickest way to find out where users struggle; contact our design team to scope one.