Mobile App UI/UX Design Services
Intobi’s mobile app design services help you launch a new app or redesign an existing one for iOS, Android, and cross-platform products. You get UX research, wireframes, UI design, prototypes tested with real users, a design system, and a clean developer handoff that follows Apple and Google guidelines. When you need it, the same team builds the app.
Founded
2017
Completed projects
100+
Trusted by numerous partners
TL;DR
Intobi designs iOS, Android and cross-platform apps: UX research, wireframes, UI design, prototypes tested with real users, a design system and a developer-ready handoff that follows Apple and Google guidelines. Our designers work next to our engineers, so every screen is checked for feasibility, and the same team can build the app. Projects start at $10,000, with an estimate broken down by phase.
Make a summary of this page with AI:
- 100+ – Projects delivered
- 90% – Client retention
- 2017 – Year founded
- 1 – Business day to reply
- 50+ – Client reviews on Clutch
Design That Starts With Business Goals
Mobile app design services cover research, UX, UI, prototyping, design systems, and developer handoff for iOS, Android, and cross-platform apps. The goal is an app people understand on the first try, and engineers can build without guesswork, whether you are launching a new product or redesigning an existing one.
As a mobile app design agency inside a software development company, Intobi works business first, code second. We agree on what the app must do for your users and your business, then shape every flow around that goal. Our mobile app UI/UX design services end with a design system and dev-ready Figma files, so engineers, ours or yours, build what you approved.
What's Included in Our Mobile App Design Services
UX research & audit
We study your goals, users, analytics, and market, or audit the app you already have, and turn the findings into a ranked list of problems the design must solve, with user personas where they help
Information architecture & wireframes
We map screens, navigation, and user flows, then sketch low-fidelity wireframes, so the structure is agreed before any visual work starts and every feature has a clear place in the app
UI design & prototypes
Mobile app UI design for every screen and state, with gestures and transitions, linked into clickable prototypes you can tap through on a phone. Explore our UX/UI design and consulting.
Design system & UI kit
Gestures, transitions, and tap feedback defined screen by screen, so each interaction feels natural on the platform it runs on
Usability testing
We test prototypes with people who match your audience, note where they hesitate or get lost, and fix those flows before development begins, when changes are still cheap
Developer handoff
Dev-ready Figma files with specs, assets, and interaction notes. Our designers stay available while engineers, from our mobile app development company team or yours, build the screens.
How We Design Your App in Five Steps
Our mobile app design process has five steps, each ending with a deliverable you review and approve.
Step 1
Discover and audit
We clarify goals, users, and constraints, review analytics or the current app, and agree on scope. Stakeholders from product, marketing, and engineering join this step. Deliverable: a research summary with feature priorities.
Step 2
Structure the flows
We map navigation and user journeys, then wireframe the key screens and check them with you. Edge cases such as empty states and errors are mapped here too. Deliverable: information architecture and wireframes.
Step 3
Design the interface
Approved wireframes become high-fidelity iOS and Android screens with real content that follow Apple’s Human Interface Guidelines and Google’s Material Design. Deliverable: UI design and a clickable prototype.
Step 4
Test with real users
We run usability sessions on the prototype and refine the screens where people struggle or drop off. Each change is traced back to what testers did. Deliverable: test findings and updated designs.
Step 5
Hand off and support
We collect components into a design system, prepare Figma files with specs, and walk your engineers through the files. We stay on during the build and after release. Deliverable: design system, UI kit, and developer handoff.
Plan Your App Design
Book a Design Call
Platforms and Frameworks Behind Our Designs
Every design follows Apple and Google platform guidelines and is prepared for native Swift and Kotlin or cross-platform Flutter, React Native, and Kotlin Multiplatform builds.
iOS
Android
Swift
Kotlin
Flutter
React Native
Kotlin Multiplatform
Mobile App UI Design for Your Industry
Calm, accessible screens for patients and experts: the approach behind MindTales, an AI-enabled mental health platform where we handled UI/UX design, the Flutter app, and the Python backend. See our healthcare software development
Read more about Healthcare
Retail
Product browsing, carts, and checkout flows that keep shoppers oriented from the first tap to a completed order. We applied this to Chaumet, a luxury jewelry shopping app we designed and built
Marketplaces
Two-sided experiences that give buyers and sellers their own clear paths through listings, messaging, and transactions, like Valandinis, which connects construction businesses with workers
Finance
Dashboards, payments, and account screens designed for clarity, so users can read balances, spot changes, and confirm every payment or transfer with confidence, even on a small screen
Travel
Search, booking, and itinerary flows built for people on the move, often using one hand on a small screen and a weak connection, with key details available at a glance.
Content feeds, players, and discovery screens that put stories, video, and audio first. Explore our media and entertainment software, from streaming to video creation tools
Read more about Media
Course structures, progress tracking, and lesson screens that help learners of different ages find their way and come back to the next lesson. See our education app development
Read more about Education
Social
Profiles, feeds, and messaging interfaces where interaction design makes every reaction and reply feel immediate, as in Vibe, a dating app we designed and built
Design Only vs. Design & Development
| Design only | Design and development | What to consider | |
|---|---|---|---|
| Scope | Consulting, prototyping, UX and mobile app UI design, usability testing | Full design scope plus engineering, QA and App Store and Google Play release | Match the scope to the engineering capacity you already have |
| Handoff | Design system and developer handoff to your in-house or partner team | Designers and engineers work side by side, with no hand-over between vendors | A clean handoff matters most when another team writes the code |
| Build approach | Screens prepared for native or cross-platform engineering | Native iOS and Android development or Cross-platform app development | Choosing the stack early keeps design and code aligned |
| Accountability | Intobi owns the design; your developers own the build | One accountable team from early concept to store launch | Count how many teams must agree before a feature ships |
| After release | Post-release design support for updates and new features | Post-release support from the team that designed and built the app | Plan for iteration as user feedback arrives after launch |
| Best fit | Teams with in-house developers who need product design | Teams seeking mobile app design and development services from one partner | Decide based on who will own the codebase after launch |
Mobile App Design Cost & Timeline
Projects start at $10,000, and every estimate is built on your scope. The main cost drivers are the number of screens and user flows, the platforms you need (iOS, Android, or both), the depth of research and usability testing, the scope of the design system, and the number of design iterations. For a redesign, cost also depends on how much of the current UI you keep.
If you only need mobile app UI design services on top of an existing UX, the estimate reflects that. Duration follows the same factors, plus how quickly feedback rounds close on your side. Share your goals, and you get a scoped estimate before design work begins. It is broken down by phase, so you can approve research and wireframes first. See our pricing and hourly rates.
Why Product Teams Choose Intobi
Design and engineering in one team
Designers work next to Swift, Kotlin, Flutter, and React Native engineers, so every screen is checked for feasibility before you approve it, and nothing gets lost between design and code
From startups to enterprises
Since 2017, we have delivered 100+ projects for startups, growing businesses, and enterprises, from MVP development and our work as a SaaS development company to web development, with 90% client retention
Transparency at every step
You see the reasoning behind each screen and every trade-off we suggest. Transparency, quality, client focus, and innovation guide how we work, and every review ends with clear next steps
US company with a strong Ukrainian team
Intobi is a US company with a strong Ukrainian team and an office in Kyiv. We design and build apps for clients in the US and beyond, and have worked with EU clients directly since 2021. The team works in English and Ukrainian
Reply within one business day.
Our CBDO reviews every new inquiry personally. You get a reply within one business day and a clear next step, whether you need a mobile app design agency for one release or a long-term product team
Partner that can become your team
On Clutch, Gradguide’s Head of Product says our developers act “as an extension of our team.” That’s the long-term partnership we aim for with every product team
Client Feedback on Our Mobile App Design
Get a Design Estimate
Request a design estimate
Related Services for Your Mobile App
Plan the full product, from discovery and positioning to roadmap and feature priorities, with our product design services. Useful when the app is one part of a larger platform
See how approved iOS screens move into a native build with Swift for iOS, keeping animations, gestures, and system controls as designed
Learn how Android layouts become a production app with Kotlin for Android, from navigation patterns to adaptive layouts for different screen sizes.
Explore Flutter to ship one design to iOS and Android from shared code, the stack we used for the MindTales mental health app.
Turn one approved design into an iOS and Android app with React Native, built by the team that designed it.
What does a mobile app design agency do?
It turns a product idea or an existing app into screens people understand and enjoy using. At Intobi, that means aligning on business goals, mapping user flows, building prototypes, crafting the visual interface, and testing it with users. Then we support the product as it evolves after release.
What is included in mobile app UI/UX design?
UX work covers user research, user flows, and clickable prototypes that show how people move through the app. UI work covers layout, typography, color and components. Interaction design adds gestures, transitions, and screen states. Everything is organized into a design system so new screens stay consistent as the app grows.
Do you design for both iOS and Android?
Yes. We design for both platforms and respect each one’s conventions, so navigation, controls, and gestures feel native to iPhone and Android users alike. If you plan a shared codebase, we shape the design to translate cleanly into a cross-platform build without losing the platform-specific details that matter.
Can you also develop the app after the design is done?
Yes. Our mobile app design and development services let the same team carry approved designs into a native or cross-platform build. Designers stay involved during development. If you have in-house engineers, we can stop at developer handoff and hand over everything your team needs.
What is your mobile app design process and what shapes its timeline?
We start with goals and users, then move into user flows and prototypes. Next we design the UI, test with real users, and refine before handoff. The schedule follows your scope: how many screens and flows, which platforms, and how deep research and testing go. We confirm it in a scoped estimate before work begins.
What do we receive at handoff?
You get developer-ready designs for every screen and state, interactive prototypes, and a design system with components, tokens, and documentation. Engineers can build exactly what was designed. Our designers remain available during development to answer questions and review the implementation.
How do you validate app designs with real users?
We run usability tests on clickable prototypes with people who match your target audience. We watch where they hesitate or get lost, then revise the flows before any code is written. After launch, post-release support lets us use real feedback to guide design updates.
What affects the cost of mobile app design services?
Projects start at $10,000, and the final price follows your scope. The main factors are the number of screens and user flows, whether you need iOS, Android, or both, the depth of research and testing, and whether it’s a new app or a redesign. Share your idea and must-have flows, and our CBDO will follow up with a scoped estimate. See our pricing for packages and hourly rates.