App Concept & Market Validation
We test your idea against user needs and rival apps, so you build the features that matter first.
- Feature priority list
- Competitor app review
Digital Experience & UI/UX Design
Mobile App UI/UX Design Services
We design iOS and Android apps that follow Apple and Material conventions, with thumb-friendly navigation, gestures and tested flows, so users get started quickly and keep coming back.
- iOS & Android design
- Navigation patterns
- Gesture & touch flows
- Interactive prototypes
- Years of delivery
- 8+
- Years of delivery
- Projects shipped
- 350+
- Projects shipped
- Clients across US, UK, AU & SG
- 200+
- Clients across US, UK, AU & SG
What’s included
Everything You Need to Design an App People Keep Using
We design iOS and Android app experiences from first concept to store-ready screens that feel native on each platform.
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Mobile User Flows & Navigation Design
We map onboarding, tab bars and gestures around thumb-friendly use, helping users reach key actions quickly.
- User flows
- Navigation map
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App Wireframes & Clickable Prototype
You tap through the app on a real device before development, which lets you validate flows cheaply.
- App wireframes
- Device prototype
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iOS Human Interface Guidelines Design
Screens follow Apple conventions so your iPhone and iPad users find the app familiar, and App Store review goes smoothly.
- iOS screen designs
- Component specs
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Android Material Design Screens
We design for Material patterns and varied Android screen sizes so the app feels right on every device.
- Android designs
- Screen size variants
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Micro-Interactions & Motion Design
Purposeful animations and feedback make the app feel responsive and increase engagement without slowing it down.
- Animation specs
- Interaction library
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Accessible Mobile UI Design
We design for screen readers, text scaling and contrast, widening your audience and reducing accessibility risk.
- Contrast checks
- Accessibility notes
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App Store Assets & Developer Handoff
You receive icons, store screenshots and engineer-ready specs, so development and launch start without delay.
- App icon set
- Store screenshots
- Dev specs
Need something specific?
Why Kramate
Why Business Owners Choose Kramate for Mobile App Design
We design apps that feel at home on each phone, and you can tap through them before building.
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Tap Through the App Yourself
Instead of
trying to imagine the app from flat pictures
With Kramate
You get a working preview to hold in your hand and show your team.
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Feels Right on Every Phone
Instead of: one design squeezed onto both phones
With Kramate: We design each phone type its own way, so people find it familiar.
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Built for Thumbs and Busy People
Instead of: tiny buttons and hard-to-reach menus
With Kramate: We test the screens one-handed, the way your customers really hold their phones.
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Start Small, Pay Only for What Matters
Instead of: paying to design features nobody uses
With Kramate: We help you pick the few features to design first and leave the rest for later.
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Ready for App Store Review
Instead of: being turned away at the last minute
With Kramate: We know what the app stores look for and design to meet it from the start.
Our approach
How We Design Your Mobile App, Step by Step
You tap through your app on a real phone before a single line of code is written.
7 clear steps 7 deliverables you keep
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App Concept Check
We test your idea against what users need and what rival apps offer, then agree the first features.
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App User Flows
We map how people sign up, move around and finish key tasks using one thumb.
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Screen Layouts
We sketch each screen in black and white, so we can agree the layout before adding colour.
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iPhone and Android Screens
We design the full screens in your brand, following the habits iPhone and Android users already know.
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Tappable Prototype
We link the screens into a version you can tap through on your own phone.
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Test on Real Phones
We watch people from your audience use the prototype and note where they slow down or stop.
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Store Assets and Handover
We prepare the app icon, store pictures and screen notes for your developers and your store listing.
Tools & technologies
Technologies We Use for Mobile App Design
We design to iOS and Android conventions, then hand off to your build framework.
- Figma: Design tool for dashboard wireframes and layouts approved before build.
- Sketch: Mac design tool for screens, icons and reusable symbols.
- Adobe Illustrator: Vector artwork that stays sharp at any size.
- LottieFiles: Lightweight animations that play smoothly in apps and websites.
- iOS: Designs follow Apple Human Interface Guidelines for iPhone and iPad.
- Android: Mobile platform for companion apps and AR on Android devices.
- Swift: Native language for iPhone and iPad apps.
- Kotlin: Native language for Android apps.
- ProtoPie: Builds realistic prototypes with gestures, sensors and logic.
- Maze: Runs remote usability tests on prototypes and reports results.
- UserTesting: Recruits real users to test and comment on your product.
- Mixpanel: Product analytics that shows what users do and where they drop off.
- Zeplin: Hands finished designs to developers with specs and assets.
- Flutter: One codebase for iPhone and Android apps.
- React Native: Build iPhone and Android apps with shared code.
- Jira: Tracks work, priorities and delivery progress.
Expert guide
Mobile App UI/UX Design Services: A Complete Guide for Businesses
Mobile app UI/UX design services shape how an app behaves in one hand, on a small screen, on a patchy connection, in the middle of other things. The work covers flows, screens, gestures, notifications and permissions, and must respect how iOS and Android each expect apps to behave.
Phones add constraints a website does not have: touch instead of a pointer, interruptions, battery limits, and an app-store review before release. This guide covers platform conventions, offline and permission design, accessibility, regional rules, what drives cost and how to choose a partner.
Whether you plan a native app for one platform or a single design shared across both, the decisions below will save rework once engineers begin building, and they help you compare proposals fairly.
What mobile app UI/UX design services cover
Mobile app UI/UX design services usually produce task flows, a navigation model, wireframes, a clickable prototype you can test on a real phone, finished screens for the supported device sizes, an icon and launch screen, and specifications for engineers. Many teams also need notification design and onboarding, and a shared component set from design system development keeps screens consistent across platforms.
Product teams building a software-as-a-service app can pair this with SaaS product design. Design help is most valuable before building, because navigation choices are expensive to change once code exists. For earlier validation see wireframing and prototyping. When design is done, mobile app development turns it into the product.
iOS and Android: where conventions differ
People expect an app to behave like the others on their phone. Apple’s Human Interface Guidelines (opens in a new tab) and Google’s Material Design 3 (opens in a new tab) describe each platform’s patterns. A single design copied to both platforms usually feels wrong on one.
| Area | iOS typically | Android typically |
|---|---|---|
| Primary navigation | Tab bar at the bottom | Bottom navigation bar or navigation drawer |
| Going back | Back control in the top bar and an edge swipe | System back gesture or button |
| Primary action | Often in the top bar | Often a floating action button |
| Typography and icons | System font and symbol set | System font and Material icons |
| Alerts and sheets | Action sheets and alerts | Dialogs and bottom sheets |
Designing for both platforms need not double the cost. Share the structure, content and brand, and adapt navigation and controls per platform. Cross-platform frameworks still need these decisions made.
Designing for real-world conditions: touch, offline and permissions
The most common mobile design failures come from assuming ideal conditions. Plan for these:
- Thumb reach and target size. Put frequent actions within reach and make targets large enough to tap without errors.
- Weak or lost connection. Decide what works offline, how queued actions are shown, and how conflicts are resolved.
- Interruptions. Calls, notifications and app switching mean progress should be saved and restorable.
- Permissions. Ask for location, camera or notifications only at the moment the benefit is clear, and explain why before the system prompt appears.
- Onboarding. Show value first. Request an account only when the app needs one.
- Empty, loading and error states. Design each, not only the successful screen.
Accessibility on mobile
WCAG 2.2 applies to mobile apps as well as web content, and added criteria such as target size and alternatives to dragging movements that matter on touch screens. Read the WCAG 2.2 specification (opens in a new tab) for the exact wording, and the W3C’s accessibility fundamentals (opens in a new tab) for plain-language background.
- Support the platform’s screen readers, with meaningful labels on every control.
- Respect system text size and display settings without breaking layouts.
- Provide enough contrast, and do not rely on color alone.
- Offer alternatives to complex gestures.
- Keep animation modest and honor reduced-motion settings.
AI and device features in mobile design
Phones offer features that suit real tasks: camera-based scanning, voice input, biometric sign-in, location and on-device processing. Each has a design cost, so confirm that the feature serves a user task before including it.
If an app includes an AI assistant, design for uncertainty: show when an answer may be wrong, let users edit or undo, and keep sensitive data handling clear. Designers also use AI to draft variations and summarize test sessions, with human review.
Sustainability: battery, data and device life
Design affects battery and data use. Fewer animations, lighter images, caching and sparing use of background activity make apps friendlier to older phones, which extends the useful life of devices and widens your audience.
Industry use cases
- Field services: a job app that works with no signal, queues photos and syncs later, with large controls for gloved hands.
- Banking: biometric sign-in and clear confirmation for payments, with careful wording around fees and failures.
- Healthcare: appointment, reminder and results screens built for readability and privacy on a shared device.
- Retail: loyalty and checkout flows that reuse saved details and offer wallet payments.
- Travel: itinerary screens that stay usable offline and surface changes first.
These are illustrative examples, not Kramate client results.
Regional considerations: USA, UK, Australia and Singapore
Mobile app UI/UX design services must reflect that apps collect personal data through permissions, so privacy and accessibility rules shape the design. Confirm specifics with legal counsel.
- USA: the ADA is applied to apps as well as sites, and federal procurement uses Section 508; see Section508.gov (opens in a new tab). State privacy laws affect consent flows.
- UK: the Equality Act 2010 and UK GDPR. Public sector apps follow the requirements summarized by GOV.UK (opens in a new tab).
- Australia: the Disability Discrimination Act 1992 and the Privacy Act 1988.
- Singapore: the Personal Data Protection Act affects consent and notification design.
Both app stores require a privacy disclosure and apply review rules, so the permission screens and data wording in the design should match what the app actually does. Delivery overlap with US Eastern time is four to six hours at Kramate, and a full working day with the UK, Australia and Singapore.
Cost factors and how to plan a budget
For mobile app UI/UX design services, cost drivers include the number of flows and screens, whether you design for iOS, Android or both, tablet support, the amount of custom animation, offline behavior, account and payment flows, accessibility testing and the number of testing rounds.
Fixed price works for a defined set of flows. A dedicated team suits an app that will keep evolving, and hourly work suits reviews and fixes. Budget for design support during development, since engineers will have questions, and for adjustments after store review.
How to choose among mobile app UI/UX design services
- Ask to see apps on both platforms and how the designs differ between them.
- Check prototyping practice: testing on real devices, not only slides.
- Ask about offline, permission and error-state design with an example.
- Confirm accessibility approach for screen readers and text sizing.
- Look at handoff quality: specifications, assets and components developers can use.
- Understand the link to engineering, whether in-house or through your development partner.
How Kramate delivers mobile app design
A dedicated project manager runs the work, with daily updates on Slack or Teams and a prototype review at the end of each two-week round. We sign an NDA before detailed discussions, and all intellectual property is transferred to you. Choose fixed-price, dedicated-team or hourly terms, and Kramate can lead the design or join your team. Read our delivery approach for the steps.
Frequently asked questions
What are the main iOS vs Android design differences?
Navigation, back behavior, primary action placement, system components and typography follow each platform’s guidelines. Structure and branding can be shared, but each app should feel native to the phone it runs on.
How do I design an app for both iOS and Android?
Share the information structure, flows and visual identity, then adapt navigation and controls per platform. Decide early whether to use a cross-platform framework, since it shapes which components are available.
How much does mobile app design cost?
It rises with the number of flows, platforms, states and testing rounds. A scoped, itemized estimate is more useful than a rough number; Kramate provides one within 24 hours of a free consultation.
How should an app behave when there is no internet?
Decide which tasks must work offline, save the user’s work locally, show clearly what is waiting to sync, and explain failures in plain words. Design these states in advance.
When should an app ask for permissions?
At the moment the feature needs it, after a short explanation of the benefit in your own screen. Asking for everything at first launch leads to refusals that are hard to reverse, because users must then dig through system settings.
Do I need design before hiring app developers?
Usually yes. Settled flows reduce rework, and a tested prototype shows engineers exactly what to build and where the hard parts are. See mobile app development for the build stage that follows.
Sources and further reading
- Human Interface Guidelines (opens in a new tab)Apple
- Material Design 3 (opens in a new tab)Google
- Web Content Accessibility Guidelines (WCAG) 2.2 (opens in a new tab)W3C
- Section508.gov (opens in a new tab)US GSA
- Understanding accessibility requirements for public sector bodies (opens in a new tab)GOV.UK
- Accessibility Fundamentals Overview (opens in a new tab)W3C WAI
FAQ
Frequently asked questions
Cost depends on the number of screens and flows, iOS, Android or both, research depth, prototype detail, animation needs and handoff material. A complex app costs more than a simple one. We send a no-obligation estimate within 24 hours. Custom animation, onboarding sequences and offline states all add design effort beyond the basic screens.
Stages usually include discovery, user flows, wireframes, visual design, interactive prototype, testing and developer handoff. Schedule depends on screen count, platforms, stakeholder feedback speed and whether user testing is included. Early work covers user flows and wireframes, and visual design follows once the flow is approved.
You do. We sign an NDA before detailed discussions and transfer all design files, assets and specifications to you. This includes the source files, so any developer or designer can continue the work. Each screen is delivered with spacing, states and assets exported for both platforms.
Yes. We design in Figma, share files with your developers and follow your naming and handoff conventions. If you have a design system or brand guide, we design within it and answer developer questions during build. Your developers receive redlines, exported assets and a clickable prototype, so questions get answered inside the files.
Follow each platform's conventions where users expect them, such as navigation and system controls, and share branding and core flows. Fully separate designs cost more, so many apps use one design with platform-specific adjustments. Shared elements such as colors, typography and the core journey stay the same, while navigation follows each platform's own habits.
Prepare your target users, main goals, competitor apps you admire, existing brand assets and any technical limits. A rough feature list helps. Even a simple problem statement lets us start discovery faster. Existing analytics or customer feedback help us decide which flows deserve the most attention.
Measure it through usability testing results, task completion, onboarding completion and app store feedback after launch. Before launch, test prototypes with real users. Design quality shows up in whether people finish key tasks without help. Watching a few people complete sign-up and a core task on a prototype reveals problems early.
Taking new projects
Let’s talk about your Mobile App UI/UX Design Services needs
Tell us about your project and get a free consultation and estimate within 24 hours.
- We reply within 4 business hours A real consultant reads your brief — no bot, no queue.
- 30-minute discovery call We dig into goals, constraints and budget. NDA signed on request.
- Proposal in 24 hours Scope, timeline, team and price — clear enough to decide on.
NDA on request You own the IP No obligation Free estimate