App Design for iOS & Android
We design apps people enjoy using, from the first concept to the final screens. You get an individual quote after a free consultation.
Our app design process
UI/UX Design
We design intuitive user flows, so your app is easy to use and looks great.
iOS & Android
We use one design system for both platforms, so the app feels consistent on every device.
Prototyping
You test a clickable prototype before we write any production code.
Design System
We build reusable components so the design stays consistent across the entire app.
App design packages
App Design
UI/UX design for mobile apps
3-4 weeks
- iOS & Android design
- User flow mapping
- Wireframes & prototypes
- Interactive prototype
- Design system
MVP Development
Fully functional mobile app
8-12 weeks
- iOS & Android app
- React Native development
- Backend integration
- User authentication
- Push notifications
Custom App
Custom enterprise app
12-16 weeks
- Native iOS & Android
- Custom backend & APIs
- Advanced features
- Offline mode
- Real-time sync
What app design at Senorit covers
App design is the step before development: we work out how your app looks and how people operate it. That saves development cost, because a problem is cheaper to solve on a design file than after it has been built.
Design work
- User research and user-flow analysis
- Wireframes for every core view (low fidelity)
- Visual design (high-fidelity mockups in Figma)
- Clickable prototype for testing with real users
- Design system with reusable components
Platforms and methods
- iOS Human Interface Guidelines (Apple)
- Material Design 3 (Google Android)
- React Native with Expo modules and local builds for cross-platform development
- Figma Dev Mode for a clean developer handover
- Accessibility: WCAG 2.2 AA for mobile
Tools: Figma, FigJam for user flows, Maze for usability testing.
App design for Hamburg industries
Hamburg is a base for logistics tech, maritime software and health apps. Hospitals and medical practices offer patient apps. Logistics companies at the port need scan-and-track apps for warehouse staff, and restaurant groups run ordering and loyalty apps.
Each audience asks for something different. Warehouse staff often operate the app wearing gloves and need large touch targets. Patient apps have to be GDPR-compliant and accessible. Hospitality apps have to load fast, because guests don't want to wait.
We account for these constraints during design, before anyone writes a line of code.
A worked example: the VetCar24 staff app
For VetCar24, a mobile veterinary emergency service in Hamburg, we built a staff app alongside the website. It lets the veterinary team see bookings in real time, update the status of a call-out and receive push notifications.
Design started with a user research interview: how does the team work on a call-out, which information do they need immediately, and which can wait? From the answers we drew wireframes, then a high-fidelity design in Figma that became the basis for the React Native development.
- Platform: React Native with Expo modules, local builds
- Real-time status updates
- Push notifications for new bookings
- PWA-capable, usable without an app store install
Our own apps
Alongside client work we develop our own Android apps. They have a site of their own: Senorit Apps. How they were built is covered in the case studies for LithoCanvas and Glenby.
Scope and delivery
What is included
- Wireframes for every main view
- High-fidelity mockups in Figma
- Clickable prototype
- Design system and component library
- Developer handover via Figma Dev Mode
Not included
- App development (quoted separately)
- App store submission
- Backend development
- User testing with external participants
Delivery: a UI design is usually ready in 3 to 4 weeks. Your fixed-price proposal states the exact timeline.
Common questions about app design
Do I need the design finished before development starts? +
Not strictly, but it helps. A clickable prototype lets you test the app with real users before you spend anything on development. Problems found in design cost a fraction of what they cost once built.
Do you only design, or do you build as well? +
Both. Senorit will take on the whole app if you want it: design and development with React Native. Design and code come from the same place, so nothing is lost in handover.
How many screens does the app design cover? +
We set that after the first call. The scope depends on how many main screens you need in Figma and whether you also want a design system with states, animations and error screens. Your fixed-price proposal covers both.
App retention: what the numbers show
According to Quettra data analysed by Andrew Chen in 2015, the average Android app loses 77 percent of its daily active users within the first three days after install, and 90 percent within 30 days.
For a Hamburg business launching an app, the first days after install matter most. A design based on real user flows and real feedback helps you keep users through that phase.
Source: Andrew Chen, "New data shows losing 80% of mobile users is normal" (2015), data from Quettra
By Ebrahim Seyfi, Senorit Hamburg. Updated 12 October 2026.
Ready for your app?
The consultation is free, and we will show you what is possible.