UI/UX Design Services

Updated September 2026 · Written and maintained by the Progression Agency strategy team

Progression Agency provides UI/UX design services for mobile apps and web applications: research, user flows, wireframes, high-fidelity interface design, prototypes and design systems, delivered by the same team that can build the app.

On this page · 11 sections

What is UI/UX design?
UI/UX design services
Key features and components
Common integrations
Accessibility and platform guidelines
Our UI/UX design process
How much do UI/UX design services cost?
Technology we typically use
Mistakes to avoid
Why choose Progression Agency for UI/UX design?
Related services

The short answerUI/UX design is the work of deciding what an app does on each screen (UX: flows, structure, content) and how it looks and responds (UI: layout, type, color, components), tested with real users before engineering starts. A UI/UX design engagement for a business app commonly costs $8,000-$40,000 as a planning figure; a full design system for a product $25,000-$80,000.

Cost ranges are US planning figures, not quotes.

UI/UX design searches — Businesses search for a UI/UX design service when an app is planned, when users are not converting, or when a product has outgrown its first interface.

What is UI/UX design?

UI/UX design is the discipline that turns a product idea into screens people can use: UX covers research, flows, structure and usability; UI covers the visual layer, from layout and typography to the component library engineers build from.

Design and engineering are separate skills but one process; our designers sit with the developers who will build the screens, so what is designed is what ships. See mobile app development and web app development.

UX — UX research. Interviews, tests, analytics..

IA — Flows and structure. Journeys, navigation..

UI — Interface design. iOS, Android, web..

Sys — Design systems. Tokens and components..

Projects we are most often asked to build.

Mobile app UI/UX design

iOS and Android app design to Apple’s Human Interface Guidelines and Google’s Material Design, with platform-native patterns.

Web app and dashboard design

Web-based app design for portals, SaaS products and internal tools: dense data, roles and responsive layouts.

UX research and usability testing

Interviews, task-based tests and analytics review that show what users do rather than what they say.

Prototyping

Clickable prototypes in Figma to validate flows with users and stakeholders before code.

Design systems

Tokens, components and documentation so every new screen is consistent and faster to build.

UX audits and redesigns

A structured review of an existing app’s flows, accessibility and conversion, with a prioritized fix list.

A structured review of an existing app’s flows, accessibility and conversion, with a prioritized fix list.

Key features and components

What separates a useful build from a costly one.

UI/UX design: key components
Feature	Why it matters
User research first	Designs solve real problems
Platform guidelines	Feels native, passes review
Accessibility (WCAG 2.2)	Usable by everyone
Prototype testing	Problems found before code
Design tokens	Consistent, themeable UI
Component library	Faster engineering
Developer handoff specs	No guesswork in build
Analytics hooks	Measure after launch

Common integrations

Where the value usually comes from.

Common integrations
System	What we connect
Design tools	Figma, FigJam
Prototyping	Figma prototypes, ProtoPie
Research	Maze, UserTesting, session replay
Analytics	GA4, Mixpanel
Engineering	SwiftUI, Jetpack Compose, React
Accessibility	WCAG 2.2, VoiceOver, TalkBack

Accessibility and platform guidelines

Good design is design that works for every user and passes store review.

Interfaces follow the Apple Human Interface Guidelines and Material Design 3 where each platform expects it.
Color contrast, touch targets, focus order and screen-reader labels are designed to WCAG 2.2 AA.
Text scales with system font settings; layouts are designed for the largest accessibility sizes, not only the default.
Privacy prompts, permissions and account deletion flows are designed in from the start.

How we deliver UI/UX design — Testing a clickable prototype before engineering is the cheapest fix in the whole project.

Our UI/UX design process

We start with research and the business goal, map the user journeys, wireframe and test the core flows, design the high-fidelity screens and design system, then hand off specs and components to engineering, staying involved through build and launch.

How much do UI/UX design services cost?

As planning figures, a UX audit commonly costs $3,000-$8,000, the UI/UX design of a business app $8,000-$40,000, and a full product design system $25,000-$80,000, depending on screens, platforms and research depth.

UI/UX design cost ranges (planning figures)
Scope	Typical range	Timeline
UX audit and fix list	$3,000-$8,000	1-2 weeks
App UI/UX design (one platform)	$8,000-$25,000	3-6 weeks
App UI/UX design (iOS + Android + web)	$20,000-$40,000	5-8 weeks
Product design system	$25,000-$80,000	6-12 weeks

Technology we typically use

Mainstream, maintainable choices.

Technology we typically use
Layer	Choice
Design	Figma
Prototyping	Figma, ProtoPie
Research	Interviews, Maze, analytics
Handoff	Figma Dev Mode, tokens
Accessibility	WCAG 2.2 checks
Engineering	Same team builds it

Mistakes to avoid

Common causes of overruns and low adoption.

Designing screens before defining the user’s core task.
Skipping prototype testing to save a week.
Copying a competitor’s interface without its context.
Ignoring platform conventions on iOS or Android.
Treating accessibility as a final check.
Handing off pictures instead of specs and components.

Why choose Progression Agency for UI/UX design?

Engineering, design and go-to-market in one team.

Designers and engineers in one team, so designs are buildable and built as designed.
Research and testing before high-fidelity work.
Design systems that make every later feature cheaper.
You own the code, data and accounts.
Headquartered in New York City, working nationwide.

See mobile app development, web app development, how to choose a product design agency and how to build an app.

Ready to scope it?

Tell us the users, workflow and systems involved. We will propose a first release and planning estimate.

Get a proposal

Getting found in search

AI, AEO and what is changing

Paid media and lead generation

Websites and design

Choosing and working with an agency

Software and app development

Social, content and brand

By industry and by situation

Frequently asked questions

What is a UI/UX design service?

A service that researches users, designs the flows and screens of an app or web product, tests them with real users and hands engineering a buildable design system.

How much does UI/UX design cost?

As planning figures, $8,000-$40,000 for a business app and $25,000-$80,000 for a full product design system.

How long does app UI/UX design take?

Commonly 3-8 weeks depending on platforms, screens and research depth.

What is the difference between UI and UX design?

UX is the structure and behavior of the product; UI is its visual layer and components. Both are needed and we deliver both.

Do you design web-based apps as well as mobile apps?

Yes: portals, SaaS products, dashboards and internal tools, responsive across desktop and mobile.

Do you follow Apple and Google design guidelines?

Yes, iOS designs follow the Human Interface Guidelines and Android designs follow Material Design 3.

Can you redesign an existing app?

Yes, starting with a UX audit that prioritizes fixes by impact.

What do you deliver?

Research findings, flows, wireframes, high-fidelity screens, a clickable prototype, a design system and developer handoff specs.

Which tools do you use?

Figma for design and prototyping, plus research and analytics tools chosen per project.

Do you test designs with users?

Yes, prototype tests with real users before engineering starts.

Is accessibility included?

Yes, designs target WCAG 2.2 AA and platform accessibility features.

Can your team also build the app?

Yes; the same team provides mobile and web development, which removes handoff gaps.

Do you create design systems?

Yes: tokens, components and documentation for consistent, faster product work.

What is a design system?

A shared library of design tokens, components and rules that keeps every screen consistent and speeds engineering.

Should I choose a UI/UX design firm or a freelancer?

A firm brings research, design and engineering together; a freelancer suits small, well-defined screens.

How is app design priced?

By scope: platforms, number of screens, research and testing depth, and whether a design system is included.

Do you design for iPad and tablets?

Yes, with layouts adapted for larger screens rather than stretched phone screens.

What is a UX audit?

A structured review of an existing product’s flows, usability, accessibility and conversion, with a prioritized fix list.

Who owns the design files?

You do, including the Figma files and design system.

Where is Progression Agency located?

New York City, serving clients across the United States.

Are you an app design co that also builds the app?

Yes; we are an app design company and a development team in one, so designs are built as designed.

Do you do app design iOS-first or Android-first?

Both; app design for iOS follows Apple’s Human Interface Guidelines, and Android designs follow Material Design 3.

Planning an app?We design, build, launch and maintain iOS, Android and web apps, with a written scope before any code.

Get an app proposal

Get a free marketing proposal

Tell us what you are trying to grow and we will come back with a plan, not a pitch deck. Same-day reply on weekdays.

UI/UX Design Services: Mobile App & Web App Design Company

What is UI/UX design?