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UI/UX design for mobile and web apps

An app can work perfectly and still fail if it's confusing. We design the experience (UX) and interface (UI) of mobile and web apps: we get to know your users, organize the information, create clear screens with their own identity and deliver a design system ready for any team to build.

Updated:

  • Apps that are easy to understand
  • An interface with its own identity
  • A development-ready design system
App UI/UX design: user experience design, app interface design and UX/UI designer

Design you can use without a manual

900+ projects delivered

What UI/UX design includes

From understanding users to final screens.

What our app UI/UX design service includes: app interface design, UX/UI designer and Figma prototype

Experience (UX)

  • User interviews or surveys.
  • User flow map and information architecture.
  • Wireframes of key screens.

Interface (UI)

  • Visual style aligned with your brand.
  • High-fidelity screens.
  • States, errors and empty states.

Deliverables

  • Design system with components.
  • Clickable prototype in Figma.
  • Developer specs.

Designing as you go or with UX/UI

Fixing a design problem during development costs far more than fixing it in Figma.

Designing as you go or with UX/UI
Aspect No upfront design With UX/UI by PACOWEB
Decisions The developer makes them. Based on users.
Changes Costly in code. Quick in the prototype.
Consistency Every screen looks different. Design system.
Adoption Users who drop off. Users who get it and come back.

Building an app? Start with design and save on development.

What we design

For new or existing apps.

How we design your app

We design before we code, deliver in versions you can test on your phone, and support you through launch and later improvements.

How we design app UI/UX, step by step
  1. Step 1: Discovery

    We define users, goals, must-have features, and what can wait for a second version.

    You: tell us about the idea and your users
    You get: the scope of the first version

  2. Step 2: UX/UI design

    We create the screen flow and a clickable Figma prototype to validate it before coding.

    You: test the prototype on your phone
    You get: an approved prototype

  3. Step 3: Sprint-based development

    We build in short cycles and deliver installable test versions.

    You: test each version
    You get: a working test app

  4. Step 4: Testing and publishing

    We test on multiple devices and publish on Google Play, the App Store, or your own domain.

    You: give us access to your store accounts
    You get: a published app

  5. Step 5: Ongoing improvement

    We measure usage, fix issues, and plan the next versions.

    You: share your feedback
    You get: a release plan and support

UI/UX design by industry

Experiences we design often.

App UI/UX design: case studies and project examples

Fintech and financial services

Clarity and trust when handling money.

Healthcare

Interfaces for all ages and abilities.

Retail

Fast, frictionless checkout.

What does your app need in design or maintenance? Find out in a minute

Three questions to find out whether your priority is to design, redesign, modernize or maintain.

Your answers0 of 3
Where are you now?
What kind of software is it?
What do you need first?

App UI/UX design FAQ

Can’t find your question?

Message an advisor and we’ll get back to you during business hours (Bogotá time, UTC-5).

What do you deliver at the end?

Figma files with screens, a clickable prototype and a design system with components and specs.

Can you design and have another team develop?

Yes, we deliver everything any team needs to build it and can support the review.

Do you take accessibility into account?

Yes: contrast, text sizes, touch targets and screen readers.

How long does it take?

It depends on the number of screens and flows; we give you a timeline along with the scope.

What else is UI/UX design called?

People also search for this as user experience design, app interface design or UX/UI designer. It ties in with Figma prototypes, wireframes, usability testing, technical support and updates, which we review with you when your project needs them.

Related services

Services that often complement the development of this app.

Which of these services do you need?

UI/UX design: these services are related, but they solve different things. Choose based on what you need.

  • If you need to design the interface of a new app: App UI/UX design (you are here)
  • If you need to improve the interface of an app your customers already use: App UI/UX redesign

Get a quote for your app's UI/UX design

Tell us what app you want to design, who it's for and whether you've already built anything.

  1. 1You contact us through the form or on WhatsApp.
  2. 2We talk about your business and what you need.
  3. 3You get the proposal in writing, with scope, timeline, and price.

Request your proposal

We reply during business hours (Bogotá time, UTC-5), usually the same day.

Your request0 of 6 required fields
Include your country code, for example +1 for the US.

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