App design that starts with users and ends with results.
We design mobile apps that are intuitive, beautiful and built to perform across every device and platform.
Designed with purpose. From idea to interface.
Our app design services help businesses turn ideas into fully developed mobile apps. We focus on user needs, platform best practice and performance – delivering apps that are simple to navigate, enjoyable to use and ready to build. Apps are planned alongside the websites we build as a web design agency in Hull and York, so your app and site work as one.
Get a QuoteA design process that puts users first.
We combine research, planning and design to create apps that people want to download, use and return to.
Discovery & user research
We start with workshops, interviews and competitor analysis to uncover user expectations and product requirements. This helps us shape an app that meets real-world goals and adds genuine value.
Wireframing & user flows
We map out the structure of your app before designing visuals. Wireframes and flows define navigation, features and interactions – making it easy to validate the journey and refine functionality early.
Interactive prototyping
We build interactive prototypes that simulate the app’s behaviour. These are tested with real users, helping us uncover friction points, gather feedback and refine the experience before development begins.
UI design across devices
We design polished, on-brand interfaces that perform consistently across iOS, Android and beyond. Every screen is created with clarity and accessibility in mind, adapting seamlessly to different screen sizes.
Developer-ready handover
When finalised, designs are delivered as developer-ready files with annotations, style guides and component libraries. This makes certain your app can be built quickly and without confusion.
Design-led apps that actually get used
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User-first strategy & testing
Real users shape our design process. Through personas, interviews and usability testing, we create apps that align with user needs, habits and motivations – not assumptions.
Platform-specific UI standards
We follow Apple Human Interface and Google Material Design guidelines to create platform-native experiences. This makes your app feel natural, familiar and seamless for every user.
Responsive layouts for all screens
We design flexible layouts that adapt across phones, tablets and larger displays. Every element is built for clarity, usability and a consistent experience across devices.
Seamless user journeys
From onboarding to checkout, we create smooth, logical pathways that minimise effort and keep users engaged. Every interaction is designed to reduce confusion and encourage action.
Accessible, intuitive interactions
We build apps that are easy to use for everyone. Fonts, colours, gestures and touch targets are carefully considered to support accessibility and intuitive interaction across different abilities.
Brand-aligned visual design
Your app will look and feel like your brand. From colours and typography to icons and imagery, we design every detail to reflect your identity and stand out.
Apps that people want to use and keep using.
Our app design process delivers mobile experiences that improve engagement, strengthen retention and support long-term growth. Many businesses also combine app development with our UI/UX design services for even stronger results.
App design questions, answered
Something else you’d like to know about app design with TH3? Ask us, we’re happy to help.
Book a free consultationHow much does it cost to design an app?
It depends on how many screens and features the app has, whether it’s for iOS, Android or both, and how much research and testing is involved. Book a free consultation and we’ll go through the idea with you and follow up with a clear quote.
Do you design for both iOS and Android?
Yes. We follow Apple’s Human Interface Guidelines and Google’s Material Design so the app feels native on each platform, while the brand and experience stay consistent across both.
I only have an idea. Where do we start?
With discovery. Workshops, interviews and competitor analysis uncover what users expect and what the app needs to do. From there we map the structure with wireframes and user flows before any visual design begins.
Will I see the app before it’s built?
Yes. We build interactive prototypes that simulate how the app behaves, then test them with real users. Friction points are found and fixed before development, when changes are quick and cheap.
Do you build the app as well as design it?
Our app design service delivers developer-ready files with annotations, style guides and component libraries, so your developers can build quickly and without confusion. Apps are planned alongside the websites we build as a web design agency, so your app and site work as one; talk to us about the build side of your project.
Will the app match my brand?
Yes. Colours, typography, icons and imagery are designed to reflect your identity so the app looks and feels like your business. If your brand needs work first, see our branding service.
Will the app be accessible?
Yes. Fonts, colours, gestures and touch targets are considered carefully so the app is easy to use for people of different abilities, on every screen size.
Can you help after launch?
Yes. User needs change over time, and our UI/UX design service includes ongoing testing and support to keep the app relevant and easy to use as expectations shift.