Mobile App UI/UX Design · Mumbai
Mobile app UI/UX design people understand instantly.
We research your users, map every journey and design screens that feel natural on Android and iOS, then test them as a clickable prototype before a line of code is written. You get designs your developers can build exactly, and an app people understand without a tutorial.
What is mobile app UI/UX design?
Mobile app UI/UX design is the process of planning how an app works and how it looks. UX (user experience) design covers user research, user journeys, information architecture, wireframes and usability testing. UI (user interface) design covers the visual layer: layouts, typography, colour, icons, components and motion. Together they decide whether users can complete tasks quickly and want to come back.
What does ABC Designs’ mobile app UI/UX design service include?
ABC Designs, a digital agency in Andheri East, Mumbai founded in 2012, provides user research, UX strategy, information architecture, wireframes, visual UI design, design systems, interactive prototypes, usability testing and developer handoff for Android, iOS and cross-platform apps. Every project ends with a tested prototype and a design file your developers can build from directly.
01 — Diagnosis
Why do users abandon an app after the first use?
When we review apps with poor ratings or low retention, the cause is usually one of six design problems, and most are visible within the first three screens.
Confusing onboarding
You’ll notice: long sign-up forms, permission requests on launch, or no idea what to do next.
How we fix it: Short, progressive onboarding that shows value before asking for details.
Cluttered screens
You’ll notice: too many options on one screen, so users can’t find the main action.
How we fix it: Clear visual hierarchy with one primary action per screen.
Inconsistent design
You’ll notice: buttons, colours and patterns change from screen to screen.
How we fix it: A design system of reusable components and rules.
Ignoring platform conventions
You’ll notice: an iPhone app that behaves like an Android app, or the other way round.
How we fix it: Designs that follow Material Design and Apple’s Human Interface Guidelines where users expect it.
Hard to tap, hard to read
You’ll notice: small text, low contrast and buttons placed too close together.
How we fix it: Accessible type sizes, colour contrast and touch targets of at least 44–48px.
Designed without users
You’ll notice: decisions based on opinions, not on how real users behave.
How we fix it: User interviews, prototype testing and analytics before the final design.
02 — What’s included
Our mobile app UI/UX design services
Hire us to design a new app, redesign an existing one, or for a single stage such as research or usability testing. Every engagement ends with something your developers can build.
User research & UX strategy
01Understand who your users are and what they need before designing anything.
- User interviews and surveys
- Competitor app review
- Personas and key user goals
You get: Research summary + UX strategy
Information architecture & user flows
02Organise features and content so every task has a short, obvious path.
- Feature and content mapping
- Navigation structure
- Task flows for key journeys
You get: Approved app map and user flows
Wireframing
03Low-fidelity layouts that settle structure and priorities before visual design begins.
- Screen-by-screen wireframes
- Content priority and layout
- Fast review rounds
You get: Complete wireframe set
Mobile app UI design
04Visual design that fits your brand and feels natural on each platform.
- Layout, typography and colour
- Icon and illustration style
- Light and dark mode
You get: High-fidelity app screens
Design systems
05A library of reusable components so your app stays consistent as it grows.
- Buttons, inputs, cards and navigation
- Colour, type and spacing tokens
- Component states and usage rules
You get: Reusable component library
Interactive prototyping
06Clickable prototypes that look and behave like the real app.
- Tappable flows on real phones
- Transitions and micro-interactions
- Investor and stakeholder demos
You get: Shareable prototype link
Usability testing
07Watch real users try the prototype, then fix what trips them up.
- Moderated test sessions
- Task success and time on task
- Prioritised fix list
You get: Test report + revised design
App redesign & UX audit
08Find and fix what’s hurting an existing app’s ratings and retention.
- Heuristic and accessibility review
- Store review and analytics analysis
- Redesign of problem flows
You get: UX audit + redesign plan
UX audit →Developer handoff & design QA
09Designs your developers can build exactly, with nothing left to guess.
- Specs, assets and every screen state
- Edge cases: empty, loading, error
- Design review during the build
You get: Build-ready design file
App design & development →03 — UI vs UX
UI vs UX design: what’s the difference?
UX design decides how the app works; UI design decides how it looks and feels. An app needs both: beautiful screens on a confusing flow still lose users.
| UX design | UI design | |
|---|---|---|
| Focus | How the app works: structure, flows and ease of use | How the app looks: visual style, layout and interaction details |
| Questions it answers | Who are the users? What do they need to do? What is the shortest path? | What should each screen look like? Is it clear, consistent and on-brand? |
| Main deliverables | Research, personas, user flows, information architecture, wireframes, test reports | High-fidelity screens, design system, icons, motion, prototype |
| How it’s measured | Task success, time on task, onboarding completion, retention | Consistency, accessibility (contrast, size), brand fit, user feedback |
| Platform guidelines | Navigation patterns and gestures users expect on each platform | Material Design 3 on Android, Apple HIG on iOS |
We do both in one team, so research findings flow straight into the visual design. Going straight to build after design? See Android, iOS and web app development.
04 — Our process
How we design your app, in six stages
Each stage ends with something you can see and sign off, so the final design is never a surprise.
-
Stage 1 · Week 1
Discover
- Goals, users and competitors
- Review of existing app and data
- Success metrics agreed
Deliverable: Design brief
-
Stage 2 · Weeks 1–2
Research
- User interviews or surveys
- Personas and key journeys
- Pain points and opportunities
Deliverable: Research summary + personas
-
Stage 3 · Weeks 2–3
Structure
- Information architecture
- User flows for key tasks
- Wireframes for every screen
Deliverable: Approved wireframes
-
Stage 4 · Weeks 3–5
Design
- Visual UI for Android and iOS
- Design system and components
- Dark mode and accessibility checks
Deliverable: High-fidelity screens
-
Stage 5 · Weeks 4–6
Prototype & test
- Clickable prototype
- Usability tests with real users
- Revisions from findings
Deliverable: Tested prototype + report
-
Stage 6 · During build
Handoff & support
- Specs, assets and states
- Q&A with your developers
- Design QA of the built app
Deliverable: Build-ready file + design QA
05 — Timelines
How long does mobile app UI/UX design take?
A focused MVP design takes about 3–4 weeks; a full app with research and testing 5–8 weeks; a large, multi-role product 8–12 weeks or more. The number of screens, user types and testing rounds set the pace.
MVP design. 10–20 core screens, one main user type, light research and one round of prototype testing.
Full app design. 30–60 screens, user research, a design system, two rounds of testing and full developer handoff.
Complex product. Several user roles (for example customer, vendor and admin), dashboards, and design for Android, iOS and web.
Typical ranges from our projects, not a guarantee. Bars are illustrative.
06 — Reporting
How we measure good app design
Design is judged on what users do, not on how the screens look in a presentation. These are the numbers we agree with you up front.
| Metric | Why it matters | Source |
|---|---|---|
| Task success rate | Can users complete key tasks (sign up, order, book) without help? | Usability tests |
| Time on task | How long the key tasks take; shorter usually means clearer design. | Usability tests |
| Onboarding completion | How many new users finish onboarding and reach the first useful screen. | Firebase / GA4 funnels |
| Retention (day 1, 7, 30) | Whether people come back after the first use. | Firebase / GA4 |
| Store rating & review themes | What users praise or complain about after launch. | Play Console / App Store Connect |
| Accessibility | Colour contrast, text size, touch targets and screen-reader labels. | WCAG 2.2 checks |
| “How do I…?” support requests | Fewer usability questions to your support team. | Helpdesk / chat logs |
07 — Design by business type
What we prioritise depends on who uses your app
Startups & MVPs
Investors and early users need to understand the idea instantly.
FOCUS · Clickable prototype, lean core flows
E-commerce & D2C
Every extra tap between product and payment costs sales.
FOCUS · Product discovery, fast checkout, saved carts
Healthcare & wellness
Users may be anxious, older or in a hurry.
FOCUS · Clarity, accessibility, trust signals
Fintech & BFSI
Every screen has to feel safe and every number has to be clear.
FOCUS · Security cues, error prevention, clear figures
Education & coaching
Students and parents need to see progress at a glance.
FOCUS · Progress tracking, video, parent views
Enterprise & field teams
Staff use the app all day, often outdoors or offline.
FOCUS · Speed, large touch targets, offline states
08 — Our standards
How we design: what we always do, and what we never do
We design to Material Design, Apple’s Human Interface Guidelines and WCAG 2.2 accessibility standards, so your app is familiar, usable and inclusive.
We always
- Test designs with real users before development
- Follow Android and iOS conventions where users expect them
- Design for accessibility: contrast, text size and touch targets
- Design every state: empty, loading, error and success
- Hand over editable source design files in your name
We never
- Use dark patterns that trick users into sign-ups or purchases
- Copy another company’s app design
- Hand over pretty screens with missing states
- Ignore your brand guidelines
- Skip developer review before sign-off
09 — Pricing
How much does mobile app UI/UX design cost?
App design cost depends on the number of screens, how many user types and platforms you need, and how much research and testing is involved. Most clients start with a free UX review or consultation, then receive a fixed-scope quote.
UX audit
For existing apps that need a clear list of what to fix first.
- Heuristic and accessibility review
- Store review and analytics analysis
- Prioritised fix list
- Walkthrough call
App UI/UX design
Complete design for a new app or a full redesign.
- Research and user flows
- Wireframes and UI design
- Design system + prototype
- Usability testing + handoff
Design partner
Ongoing design support for teams shipping new features.
- Design for new features
- Design QA during sprints
- Regular usability testing
- Monthly review call
What changes the price: number of screens · user roles · Android, iOS or both · depth of research · rounds of testing · animation and illustration needs.
10 — Tools
The design tools we use
Industry-standard tools, so your design files are easy for any developer or future designer to pick up.
11 — FAQ
Mobile app UI/UX design: frequently asked questions
Have a question about your own app? Book a free UX review and we’ll answer it for your app specifically.
What is mobile app UI/UX design?
Mobile app UI/UX design is the process of planning how an app works (UX) and how it looks (UI). It covers user research, user flows, wireframes, visual design, prototypes and usability testing, so the app is easy to use and pleasant to look at.
What is the difference between UI and UX design?
UX design is about how the app works: structure, flows and ease of use. UI design is about how it looks: layout, typography, colour and components. A successful app needs both.
How much does mobile app UI/UX design cost in Mumbai?
Cost depends on the number of screens, user roles, platforms and how much research and testing you need. ABC Designs gives a fixed-scope quote after a free consultation or UX review.
How long does it take to design a mobile app?
A focused MVP design typically takes 3–4 weeks, a full app with research and testing 5–8 weeks, and a complex multi-role product 8–12 weeks or more.
Do you design for both Android and iOS?
Yes. We design to Material Design for Android and Apple’s Human Interface Guidelines for iOS, sharing one design system while respecting the patterns users expect on each platform.
Can you redesign an existing mobile app?
Yes. We start with a UX audit of your current app, its store reviews and analytics, then redesign the flows that cause drop-offs and complaints, usually in stages so your users aren’t disrupted.
What do I receive at the end of a design project?
Editable design files for every screen and state, a design system, a clickable prototype, the research and testing reports, and developer-ready specs and assets.
Will developers understand your designs?
Yes. Every screen comes with specs, assets and states, and we stay available to your developers during the build to answer questions and review what they build against the design.
Do you offer usability testing?
Yes. We test prototypes with real users from your target audience, measure task success and time on task, and revise the design before development starts.
Can you work with our in-house developers or another agency?
Yes. We often design apps that other teams build. We hand over build-ready files and can join your sprints for design reviews. If you need development too, our team can build it.
Do I own the designs?
Yes. On completion and payment, the design files and assets belong to you and are handed over in editable form. [Confirm with contract terms.]
Do you design accessible apps?
Yes. We design to WCAG 2.2 AA guidance for colour contrast, text size and touch targets, and add labels for screen readers, so more people can use your app comfortably.
Do you work with clients outside Mumbai?
Yes. Our design team is based in Andheri East, Mumbai, and we work with businesses across India and internationally through video calls, shared prototypes and regular reviews.
12 — Glossary
App design terms, explained simply
- Wireframe
- A simple, low-detail layout of a screen that shows structure and content priority without visual styling.
- Prototype
- A clickable model of the app that looks and behaves like the real thing, used for testing and demos.
- User flow
- The sequence of screens and steps a user takes to complete a task, such as signing up or placing an order.
- Information architecture
- How an app’s features and content are organised and labelled so users can find what they need.
- Design system
- A shared library of components, styles and rules that keeps an app’s design consistent.
- Usability testing
- Watching real users try to complete tasks with a design to find where they struggle.
- Material Design
- Google’s design system and guidelines for Android apps.
- Human Interface Guidelines (HIG)
- Apple’s design guidance for iPhone, iPad and other Apple platforms.