In the digital space, every interaction shapes the impression of a brand.
When buttons, colors, or typography are inconsistent, the brand feels generic and unprofessional. A design system creates order: it defines clear rules and components that apply across all digital touchpoints. UI kits make these building blocks instantly usable – for websites, platforms, and apps.
We develop clear digital design principles for websites, apps, and portals. In tools like Figma, we turn them into modular UI kits your team can use right away. The result is a digital infrastructure that guides both designers and developers and makes every website or app consistent and true to your brand.
Benefits of a design system with a UI kit
Consistency
Buttons, type, and colors feel cohesive across every app and website.
Speed
Instead of redesigning every element, your team uses ready-to-go building blocks immediately.
Quality
Clean components prevent inconsistencies and improve usability.
Scalability
New features or pages can be integrated quickly.
Recognition
Your brand stays unmistakable in every digital interaction.
Team efficiency
Designers and developers work smoothly hand in hand.
A UI kit is a tool that keeps your digital brand in motion. What matters is not only creating it, but how it’s used day to day: in design, in development, and in every update. We make sure your system doesn’t gather dust in a drawer, but stays alive – delivering impact every single day.
6 keys to living UI kits
Built for everyday use
Components that are actually used – not just in a showcase.
Developer-ready
Seamlessly integrable into code and frameworks.
Flexible
Adaptable to new features and digital products.
Guided use
Clear rules prevent chaos and misuse.
Team enabler
Brings design, marketing, and IT into one workflow.
Future-proof
Scalable for growth, relaunches, and new channels.
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Das sagen unsere Kund:innen
Sebastian Gauck | CEO Fortytools
“Kein großes Blabla, kein Agentur-Bingo. SANMIGUEL hat sofort verstanden, worum’s geht – und einfach geliefert. Auf den Punkt, schnell, verlässlich. Sie haben unser Produkt nicht nur schöner gemacht, sondern fühlbar besser. Für unsere Teams. Für unsere Kunden. Und fürs Business. Genau so stellt man sich eine Partnerschaft auf Augenhöhe vor. Mit einem Ergebnis, das uns stolz macht – und einem Prozess, der richtig Spaß gemacht hat.”
Flexible. Future-proof. App-ready.
Apps place special demands on design systems: they must not only be visually consistent, but also work smoothly across different devices, operating systems, and interaction patterns. Add to that: app updates are versioned, features are rolled out gradually – so the UI kit has to be flexible and future-proof. These requirements were at the heart of our work for fortytools: we developed a design system and UI kit that combine structure, efficiency, and user-friendliness.
Less frustration – more flow: UX & UI for a smart mobile app
fortytools is software for cleaning companies – from customer management to scheduling. The challenge: lots of functionality across different devices, but little user-friendliness. We developed a design system that clearly defines structure, typography, colors, and interactions – and built a UI kit from it that the team could use immediately. The result: a modern interface, faster feature delivery, and a consistent user experience on every screen.
Frequently asked questions about design systems and UI kits
What is a design system and why do I need one?
A design system is the rulebook for your digital brand. It brings together colors, typography, buttons, layouts, and interactions and defines how they’re used across websites and apps. It includes not only visual elements, but also principles, guidelines, and the logic of how components work together.
Why you need it: because it creates consistency, efficiency, and scalability.
- Your brand feels cohesive across every digital touchpoint.
- Your team saves time because elements don’t need to be redesigned every time.
- New features, channels, or products can be added more easily – without breaks or chaos.
In short: a design system ensures your brand shows up digitally with clarity, professionalism, and long-term resilience.
What is a UI kit and why do I need one?
A UI kit is the toolbox for your digital interfaces. It includes all the building blocks needed for websites and apps: buttons, forms, navigation, icons, typography, and layouts – fully defined, reusable, and ready to use.
Why you need it: because it makes your team faster, more precise, and more consistent.
- Designers don’t have to redesign elements every time.
- Developers can work right away with clear specifications.
- Your digital presence stays on-brand, no matter how many features or updates are added.
In short: a UI kit saves time, reduces costs, and ensures your brand stays digitally professional, consistent, and future-ready.
What’s the difference between a design system and a UI kit?
A design system is the big picture – it defines the principles, rules, and building blocks that govern a brand’s digital look and behavior. It’s the strategic foundation that determines how typography, colors, spacing, components, and interactions work together to create a consistent user experience.
A UI kit is the practical implementation – the collection of finished building blocks (e.g., buttons, forms, navigation, cards) that designers and developers can use immediately. It’s the tool that turns the design system’s rules into concrete modules for websites and apps.
How do a design system and UI kit help save time and costs?
Design systems and UI kits ensure you don’t reinvent every element again and again. Instead, ready-made building blocks are available that designers and developers can use directly. This reduces alignment effort, speeds up delivery, and prevents errors.
- Projects get finished faster.
- Design and development collaborate more efficiently.
- Updates and new features become significantly more cost-effective.
What exactly belongs in a UI kit?
A UI kit is a collection of all reusable building blocks designers and developers need for websites and apps. It typically includes:
- Foundations – colors, typography, icons, spacing, grids.
- Components – buttons, forms, navigation, cards, modals.
- Interactions & states – hover, active, disabled, or loading states.
- Layouts & patterns – e.g., header, footer, lists, or dashboard modules.
- Documentation – guidelines on how to use the elements.
Which tools are used to create UI kits?
UI kits are usually created in modern design tools like Figma, Sketch, or Adobe XD. Components can be built modularly, variants defined, and tested directly in prototypes. Figma has become especially popular because it’s collaborative and connects design and development seamlessly.
How is a UI kit handed over to developers?
Handover happens via design tools with an inspect function (e.g., Figma Inspect) or via design tokens that translate directly into code. This gives developers access to sizes, colors, typography, and components – without extra back-and-forth. In agile teams, a UI kit is often linked directly to the code repository or a component library framework (e.g., Storybook).
Can a UI kit be used across platforms (iOS, Android, web)?
Yes – a UI kit can be built to work cross-platform. Shared foundations like colors, typography, and icon sets are defined, while platform-specific conventions (e.g., iOS Human Interface Guidelines vs. Android Material Design) are taken into account. This keeps the brand consistent while ensuring optimal usability on each platform.
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