App agency for B2B projects
You want to have an app developed and are wondering what the process looks like, what it costs and how to find the right partner? As an app agency with more than 10 years of B2B experience, we guide you from the first workshop to go-live and beyond.
Request a non-binding consultation View the 7 phasesConcept, design, development, testing and maintenance - all coordinated by one team
References: flaschenpost SE, CLAAS, SAP, DHL, OBI - real business applications in production
Cross-platform, iOS and Android at enterprise level - matched to your requirements
Many people confuse "having an app developed" with "having an app programmed". Programming is only one part of the whole. When you have an app developed, you are not buying a piece of code. You are buying a working digital product that convinces users and fulfills its business purpose.
App development covers all phases: requirements analysis, concept, UX/UI design, technical implementation, quality assurance, deployment, long-term maintenance and further development. Only when these phases work together cleanly does an app emerge that truly works in day-to-day business.
From our experience with well over 100 app projects, we repeatedly see the same pattern: companies underestimate the effort required for concept and design, start programming too early and pay for it later through expensive rework and delayed launches. An experienced app agency brings not only developers, but also project managers, designers and architects. That is the difference between an app that gets finished and an app that becomes good.
If you are looking specifically for information about technical implementation, visit our page on app programming. You can find a general overview of our mobile app development services here.
The complete process
This process has proven itself over more than a decade and dozens of B2B projects. Every phase has a purpose. If you skip one, you usually pay twice for it in the next.
Before a single line of code is written, the requirements must be right. What should the app do? For whom? What is the core problem it solves? In our discovery workshops, we work with you to identify which features are truly necessary, which would be nice to have and which should wait until version 2. We help you define a realistic MVP that can quickly test what works in the market. Do many projects fail in phase 1? Yes. Not because the idea was bad, but because business goals and technical feasibility were never properly aligned.
Now the idea becomes a plan. Which platform makes sense: iOS, Android or cross-platform? Which features come in which order? What should the technical backend look like? This phase produces feature lists, user stories and the rough system architecture. What we always recommend to customers: take your time here. One hour saved in this phase can cost ten hours in development.
An app is only as good as the experience it gives its users. In the design phase, wireframes, clickable prototypes and finally the finished interface are created. We test early with real users so that navigation or interaction problems do not appear only at go-live. You can find more on our app design page.
This is where design and concept become a working application. Depending on the requirement, we use native development with Swift for iOS or Kotlin for Android, or cross-platform solutions with .NET MAUI. The architecture is built so the app can grow without becoming unstable. Interfaces to ERP, CRM or other backend systems are documented clearly and implemented for long-term maintainability. For technical details, we recommend our page on app programming.
We test on real devices, not just in the simulator. Functional tests, performance tests and security tests. A typical scenario we often see: teams postpone testing until the end and then enter go-live with a long bug backlog. For us, testing is not a separate sprint at the end. It is a continuous part of development. That makes the launch more stable and less stressful.
App store guidelines are not automatic. Apple and Google review apps before publication, and a rejection costs valuable time. We support the review process, prepare store listings and help with the rollout strategy. Which users get the update first? How is the launch communicated internally and externally? That is also part of a complete service when you have an app developed.
The real life of your app begins with go-live. Operating system updates, new devices, growing user feedback and new requirements from the business all need attention. Anyone who has an app developed without planning maintenance risks having an app that no longer runs reliably 12 months later. We offer flexible maintenance models: maintenance contracts with defined service levels, monthly hourly packages and project-based further development as needed.
We hear this question often. And we answer honestly: an agency is not the right choice for every project.
| Criterion | App agency | Freelancer |
|---|---|---|
| Costs | Higher, but predictable and contractually secured | Lower hourly rate, but often hidden coordination costs |
| Breadth of expertise | Design, development, testing and project management from one source | Usually development only, rarely including design or testing |
| Availability | Team can compensate for absences, no single point of failure | Dependent on one person and their capacity |
| Scalability | Team can be scaled up or down depending on project phase | Limited to the capacity of one person |
| Long-term maintenance | Contractually secured, clear SLAs possible | Dependent on the freelancer's long-term availability |
When is a freelancer worthwhile?
When you have a clearly defined, small project, the scope will not grow and the budget is below 15,000 euros. For a simple internal tool app or a clearly delimited feature extension, a good freelancer can be the more efficient solution.
When do you need an app agency?
When your project has B2B requirements. When interfaces to existing systems such as ERP or CRM are needed. When the project runs for several months and requires different disciplines. When you need a reliable partner for maintenance and further development after go-live. And when you want to find an app developer who is not tied up with another customer tomorrow.
You can learn more about our approach to complex projects on our software development page.
Choosing the right app agency often decides whether a project succeeds or fails. This checklist will help you evaluate providers:
Has the agency implemented comparable projects in your industry? Ask for concrete results, not screenshots. Take a look at our references: projects for flaschenpost SE, CLAAS, DHL, SAP and OBI show what is possible in B2B contexts.
Does the technology used fit your requirements and what you want to maintain long term? An agency that masters only one stack is not always the most flexible choice.
How quickly and transparently does the agency respond to your first inquiry? In our experience, this is often the most reliable indicator of the later collaboration.
Is there a documented development process with clear milestones, reviews and defined deliverables? Gut feeling is not a substitute for project structure.
What happens after launch? Are there service level agreements? Is the team reachable if a critical production bug appears?
Who will actually work on your project? If you only meet the sales contact and never the developers, you should ask more questions. At Cayas, you meet your project team during the initial consultation.
Who owns the code after the project ends? That sounds obvious, but it is not always the case. Clarify this before signing the contract.
A reputable app development company will give concrete answers to all these questions. Anything else is a warning sign.
The honest answer: it depends. But these benchmarks help with an initial estimate:
The most important cost drivers when having an app developed are the platform choice (native for iOS and Android costs more than cross-platform), the design ambition (complex animations and fully custom UI are time-consuming), backend complexity (every additional interface means development and testing effort) and the number of launch features.
What we always recommend to customers: start with a focused MVP and expand after initial user feedback instead of building everything at once and later discovering that half the features are barely used.
You can find a detailed breakdown of all cost factors on our app development costs page.
Technology is not an end in itself. We choose the stack that best fits your requirements and can be maintained long term.
One codebase, iOS and Android. Significantly lower development and maintenance effort with enterprise-grade performance. Our core expertise. More about cross-platform apps.
For maximum performance and deep access to Apple platforms. Ideal if your target audience uses iOS exclusively. More about iOS app development.
Optimal performance on Android devices and close access to the Android ecosystem. More about Android app development.
"Cayas Software is an excellent team! I personally enjoyed the energy and professional support the entire team gave us during the project."
Your app agency from OWL
We are a specialized app development company from Minden in the OWL region of Germany. Not a large consulting firm with hundreds of anonymous customers, but a focused team that knows its specialization and consistently invests in it.
You can find concrete project results in our references.
Request a consultation
Let's talk about it.
Whether you want to launch a new product, modernize an existing application or build an internal process app. In a non-binding initial consultation, we clarify:
Free initial consultation - Non-binding - Response within 24 hours
FAQ
Costs depend heavily on scope. Simple apps start at around 25,000 euros, medium-complexity projects with backend integration range from 50,000 to 150,000 euros, and enterprise apps with ERP integration can be significantly higher. The main cost drivers are platform choice, design ambition and backend integration complexity.
You can find a detailed breakdown of all factors on our app development costs page.
Realistic timelines from our project experience: a simple app can be ready in 3 to 4 months. A medium-complexity app with multiple platforms and backend integration takes 5 to 7 months. A complex enterprise app with extensive integrations often takes 9 months or more. Concept, design, quality assurance and app store review are already included in these timelines.
For small, clearly delimited projects, a freelancer can be the more efficient and cheaper solution. For complex B2B projects with system integration, a longer duration and the need for long-term maintenance, an app agency is the safer choice. You are not buying an individual talent, but a team with processes, backup capacity and contractual responsibility for the overall result.
That depends on your target audience and budget. If your users are on both platforms, we recommend cross-platform development with .NET MAUI: one codebase, iOS and Android, significantly lower development and maintenance effort. For maximum performance and deep device access, we use native development.
The better the preparation, the more efficient the project. Helpful inputs for the initial consultation are: a clear description of the problem the app should solve, a rough idea of the target audience, a realistic budget and initial timeline, and a list of core features the app absolutely needs. We work out concept, design and technical architecture together with you.
Check references in your industry, ask about the concrete development process and clarify early who will actually work on your project. Finding an app developer does not mean choosing the cheapest option, but the partner with the right experience for your project. Ask for concrete project results and how the agency handles unexpected requirement changes.
The real life of your app begins with go-live. Operating system updates from Apple and Google, new device generations, growing user feedback and new business requirements require continuous maintenance. Cayas offers flexible maintenance models: maintenance contracts with defined service levels, monthly hourly packages and project-based further development as needed.
Yes. We regularly take over apps developed by other agencies or freelancers. The first step is always a code audit: we analyze architecture, code quality, interfaces and test coverage, then give you an honest assessment of what is feasible and at what effort. That lets you continue without unpleasant surprises.