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App Development in Mainz for the development of mobile applications and websites – KNGURU

Are you looking for a dedicated app agency in Mainz that professionally supports you with the customized development and maintenance of your app project? We're here for you!

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Our Projects

Over 200+ design projects

300.000+
App Downloads for projects we have managed.
5.0
50+ Reviews

Not just developers, but true consultants for your app!

In over 7 years, we've learned what truly makes apps successful. That's why we don't just develop; we also support you with concept, design, and marketing – as a team by your side.

Team Vera image
Team Ivan image
50+
Designers

With our many years of experience, we help companies of all sizes – from small startups to established corporations. We understand the needs of your target audience and offer customized app development in Mainz that clearly stands out from the competition.

Successful software solutions require a holistic approach. Through close team collaboration, we ensure a seamless user experience – from conception to implementation. We rely not only on developers but also on our own designers and marketing experts. Using modern technologies like Flutter and React Native, we develop cross-platform apps with agile methods and handle the regular maintenance of your applications.

This is what structured product design looks like in practice.

From early product ideas to structured interfaces and scalable systems – our work demonstrates how clear design helps teams build with greater confidence and less friction.

Our own startup
30,000+ users

The app for anyone who loves cars and motorsport!

DeepDays is the app for car events, community voting, and digital ticketing. From the initial idea to UX UI design and technical implementation, we developed the product entirely ourselves and quickly scaled it to over 30,000 users.

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A festival that lets you play along.

For the Glücksgefühle Festival, we developed an app that offers 200,000 visitors interactive experiences – from ticketing and gamification to live communication.

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UX/UI Design
Web App
Our Own Startup
10,000+ Users

Club Management for Leipzig's Night Owls

Clubkit is our white-label solution for smart ticketing. We built it to work like the best bouncer in town.

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clubkit logo
UX/UI Design
Mobile App
Web App

The platform for pet owners and pet professionals

With PetPlanner, pet owners can find suitable service providers nearby, book appointments online, and keep track of their pet's health data, appointments, and important information at all times.

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Recruiting Software on Autopilot

Recruiting is often chaotic and manual. With Funellab, we built a platform that automatically filters, organizes, and perfectly matches applicants.

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Web design
Artificial Intelligence

Energy that adapts to your life.

Clever-PV wanted more than just an app – they wanted to give households control over their energy. Our task: a UX and UI design that makes data clear, intuitive, and understandable. 

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Clever pv logo

Complex CAD workflows made simple & intuitive.

Mensch und Maschine stands for CAD and BIM software. We have developed an intuitive solution that simplifies complex processes and seamlessly connects teams.

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mensch und maschine logo
UX/UI Design
Product Refresh

Cook along with your favorite creators

Scoops connects food creators with their community in a new way. Influencers share their recipes directly in the app, and their followers can unlock them via a subscription, cook them, and become part of an active food community.

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From a UI dinosaur to a modern management hub.

Avviso manages parking violations and reminders – but its UX/UI still looked like Windows 98. We streamlined the user experience and brought the software into 2024.

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avviso logo
UX/UI Design
Product Refresh

Clearly manage thousands of vehicles

Smartmove needed a solution for efficient vehicle fleet management. We developed an intuitive interface with smart automations – understandable in just 10 seconds.

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UX/UI Design
Website Design
Web App

App Development in Mainz: Full-Service from Design to Marketing

Developing the perfect app for your business doesn't have to be complicated. Our proven process makes it easy.

01

Conception Phase

Concept Development, User Experience Design, and Prototype Creation

Before we start programming your app in Mainz, a well-thought-out concept is crucial. This ensures that your corporate identity and the needs of your target audience are integrated into the development process. We actively involve you from the start – together, we analyze the best ideas, and our UI/UX team handles the frontend design. Once the design meets your expectations, we implement it and create an MVP for testing.

free
02

Mobile App Agency

Mobile App Agency in Mainz for Android and iOS

Once you are satisfied with the concept, we begin development. We guarantee that the app will function flawlessly on all devices. You don't have to worry about funding multiple apps – we rely on proven frameworks like React Native, which enable parallel development for iOS and Android. This allows you to focus your budget on what matters: solutions that delight users.

03

App developers in Mainz

App developers in Mainz with cost-optimized and high-performance backend solutions

In addition to the app, you often need a backend. It's crucial to securely store login data and other information and integrate it into your workflows. Thanks to our extensive expertise in software development, we also handle this area in-house. Our backend developers work closely with the app developers in dedicated teams to prevent any coordination issues.

04

Excellent marketing

Excellent marketing for your native apps and web applications

Once the native apps are published in the Apple App Store and Google Play Store, the marketing phase begins. As an app development agency in Mainz, we actively support you in this area too. We take care of web design and marketing – our team is always thoroughly familiar with your project and presents it in the best light.

Louis Nell

CEO

Louis was never one to do things by halves. As a developer at the railway company, he programmed software that revolutionized the system – and was quickly scrapped precisely for that reason. Frustration turned into opportunity: he quit and founded KNGURU. Today, Louis and his team develop digital products that offer real value – and aren't hindered by corporate politics.

Team Louis image

Ivan Prosic

Lead designer

Four years ago, KNGURU was looking for a designer. Ivan responded on Reddit, participated in a design challenge despite a packed schedule – and prevailed. Today, he's our Lead Designer and, according to him, can even operate Figma in his sleep. He has a knack for pixels – and incredible patience for clients who "just want a quick tweak."

Team Ivan image

Vera Grosse

Project Manager

Vera came as an intern – and simply never left. Today, she juggles clients, projects, and designers simultaneously (and still finds time for a shisha). She's the only person on the team who voluntarily opens Excel spreadsheets – and even with enthusiasm. Plus, Vera can implement project plans faster than Ivan can swim (which he reluctantly admits).

Team Vera image

Strahinja Nikolic

Graphic and Product designer

Strahinja is not just a designer, but a true go-getter. He builds his own businesses on the side, thinks like a founder, and knows exactly how UX becomes not just beautiful, but profitable. With KNGURU for years, indispensable for years. Always by his side: his dog Bebba, our unofficial team mascot (no, that's not Bebba in the photo).

Team Strahinja image

+ more Kngurus, 
when you need them.

Lean or XXL? We scale with you. If your project needs more power, we bring in specialists. Developers, strategists, motion designers – all ready when you need them. Kngurus on demand!

Founders & Companies, who have entrusted us with their ideas & apps.

Good UX/UI design is not just about the outcome, but also about the collaboration that leads to it. Read here how our clients experienced their journey with us.

5.0
1200+ reviews
Davide Faga

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Do you need professional app development in Mainz? Get a free consultation now!

Are you unsure if we're the right partner for your project in Mainz? Then schedule a free initial consultation with our development team now – and let's find out together how we can successfully realize your app idea. We look forward to meeting you!
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Why should my company in Mainz have its own app developed?

A custom app adapts precisely to your business processes, increases efficiency, and strengthens customer loyalty. It creates digital added value where standard solutions often fall short.

Which technologies are used in app development?

We use modern frameworks like Vue.js, Flutter, Node.js, and Firebase. This ensures high performance, scalability, and future-proofing – tailored to your project.

What is the difference between native apps, hybrid apps, and PWAs?

Native apps are particularly powerful, hybrid apps work on multiple platforms with a single codebase. PWAs run in the browser without installation – ideal for fast, flexible solutions.

What is the difference between native apps, hybrid apps, and PWAs?

Native apps are particularly powerful, hybrid apps work on multiple platforms with a single codebase. PWAs run in the browser without installation – ideal for fast, flexible solutions.

How does a typical app project work?

We support you every step of the way, from concept phase, design, and development to testing and publication – including long-term support and updates.

How much does your app cost?

The more features your app needs to include, the more expensive it will naturally become. Therefore, we always recommend developing the app as compactly as possible initially and expanding it later.

Start your estimate

Answer a few quick questions and get an estimate for your app's cost in under 2 minutes.

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1/6
What category would you place your app in?

To estimate an app's cost, the underlying idea is particularly crucial for defining its scope.

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2/6
How many different
screens does your app need?

The number of screens your app will include provides a good basis for estimating development costs.

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3/6
Can users register in your app?

User profiles and their interactions often account for a significant portion of the development effort

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4/6
Do you already have a design for your app?

The design is the blueprint for every app. If you don't have a design ready yet, we'd be happy to help you with that too.

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5/6
Do you need a dashboard?

With your own dashboard, you always have all your app's data in view and can also create and manage content yourself.

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6/6

Book your free initial consultation now.

Based on similar projects we've supported in the past, we estimate your project will fall within a price range of approximately 65.000€ to 85.000€

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Next step

Get a free initial consultation now.

65.000€ - 85.000€ 

Want to discuss the possibilities for your app with us?
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App Agency  Mainz - Innovative App Development for All Platforms

progressive web apps

A Combination of Website and App

If your project is manageable and you don't want to invest much, a Progressive Web App (PWA) can be a cost-effective option. PWAs are based on classic web applications and use specific JavaScript functions to work offline – launchable like a normal app via a shortcut.

However, PWAs cannot be published in app stores and often do not achieve the look and feel of a native app. Nevertheless, they offer the advantage of covering all platforms simultaneously and can be developed cost-effectively from existing websites. For simple dashboards or ordering platforms, a PWA is often sufficient. With growing requirements, the codebase can be converted into a hybrid app.

cross-platform apps

One App for All Devices

If your app should feel like a native application without having to invest in each platform individually, cross-platform apps are the ideal solution. They make it possible to cover all mobile operating systems with just one codebase.

We rely on this approach and deliberately forgo native solutions. Thanks to modern frameworks like React Native, cross-platform apps do not have to lag behind native apps in design, performance, and functionality.

Programming and App Development in Mainz: KNGURU – Your Specialist for Custom Apps

Innovation, Expertise, and Tailored Solutions

For app development in Mainz, we place great importance on individual solutions. Our goal is to provide our customers with the best possible support so they can stand out from the competition – and that can only be achieved with unique approaches.

Every process begins with thorough consultation. Together, we analyze the competitive landscape and identify areas for improvement. Based on this, we develop creative solutions with strong USPs and a design that delights even demanding users.

In-house App Developers for Continuous Support

After the go-live, the real work begins for our mobile app development team in Mainz. The app requires regular updates, and feedback from the app stores must be implemented promptly.

To avoid constantly onboarding new team members, not only our project managers but also the entire development team are permanently employed. This way, developers can support your project long-term – and nothing gets lost.

App Development Experts

For the successful implementation of a digital project, it's crucial to have expertise not only in the core area. Otherwise, many areas would have to be outsourced to external partners who are not equally integrated into the project.

That's why, as a full-service app agency, we offer a wide range of in-house expertise. Whether it's backend, app development, marketing, or design – we bring all experts together under one roof so they can collaborate efficiently and pursue common goals.

Efficient App Development: The Technologies Behind Our Apps

Compelling Mockups with Figma

To ensure that the mobile app meets its original goals, it is crucial to involve customers early in the development process. Clickable prototypes are particularly valuable in this regard.

We don't want to strain your budget or overwhelm you with IDEs and coding. That's why we use Figma for our prototypes – allowing for quick, cost-effective, and intuitively testable development. In the end, we export the design as HTML, which we then use for further development.

React.js for Limitless App Development

Once you are satisfied with the prototype, we move into the implementation phase. We use solutions from the React ecosystem: from React.js with comprehensive functionality, to Next.js for server-side rendering, and React Native for standalone cross-platform mobile apps – working within a unified ecosystem ensures that the codebase does not need to be rewritten as requirements grow.

Reliable Backend with AWS and Firebase

The data your app project generates after launch must be stored securely to ensure the backend remains stable even with great success.

To minimize the effort of managing your own servers, we rely on platforms like AWS and Firebase. These providers offer sufficient capacity to function reliably even during peak loads – and largely handle backups and data security, allowing you to fully concentrate on further developing your app.

App Development with React Native and Cloud Technologies

We rely on state-of-the-art technologies in app development to ensure your app remains stable even with high user numbers.

Front-end
React Native
React
Next.JS
Back-end & Infrastructure
Firebase
Node.JS
Supabase
Railway
Integrations
RevenueCat
Stripe
Google APIs
Github
Design & Prototyping
Figma
FigJam
Illustrator
After Effects
AI Integrations
Gemini
Claude
ChatGPT

Your 30-minute meeting with real experts.

Whether it's an idea or an existing app – we'll tell you honestly where you stand. All of this is free, based on experience from over 100 projects and our own app with 30,000 users. Book your meeting now and get to know us!

How can we reach you?
Planned budget
Legal matters
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The first step is complete!

We have received your inquiries and will get back to you as soon as possible with more details. All the best, your KNGURU Team!

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