App Development from Idea to Launch.

I deliver a focused MVP in 6–10 weeks, a comprehensive app with backend and complex logic typically in 3–5 months. I'll create a realistic timeline for your end-to-end development during the initial consultation.

The fixed price for end-to-end development covers everything you need for launch: concept, UX/UI design with Figma prototype, frontend and backend development, testing, store publication, and documentation.

An MVP (Minimum Viable Product) is a version of your app with the most essential core features. I recommend an MVP when you want to quickly test your idea in the market, acquire first users, or convince investors.

Both. I build cross-platform with Kotlin Multiplatform and Compose Multiplatform, meaning shared logic for Android and iOS from a single codebase, with native performance. I choose pure native Kotlin or Swift where maximum platform depth matters. Which path fits you, I'll lay out honestly before we commit.

After the launch of your end-to-end development, you receive comprehensive documentation and a walkthrough from me. For ongoing maintenance and further development, I offer separate maintenance packages.

I start with analysis and concept after the initial consultation. You receive regular test builds and follow the progress in real time. We communicate via email, phone, or video call.

Yes, feedback loops are a built-in part of my process. Minor adjustments within the defined scope are always possible. For larger scope changes, we'll discuss the impact on timeline and budget.

You do. Upon completion and payment, I transfer all rights to the source code, designs, and all project materials to you. You also get a maintainable handover: the source code in your own repository and a documented architecture. This lets your team or any other developer take over seamlessly.

With me, you get everything from a single source without agency overhead. You talk directly to the developer who builds your app: shorter communication paths, faster decisions, and typically significantly lower costs.

Your app keeps running regardless. You receive the complete source code, traceable documentation, and a clean handover. This lets any other senior developer or your internal team take over at any time. You are never dependent on a single person. For ongoing operations, the AppBaumeister collective is also available as a backup.

Yes, your app won't be an isolated solution. It connects to your systems through existing interfaces, such as your ERP, your inventory management, or your CRM. Which integration is sensible and possible is something we clarify during discovery, before a fixed price is set.

Your data is processed in compliance with the GDPR. We choose the server and data location together, in the EU or in Germany if you wish. I provide a data processing agreement on request, and you retain full control over your data. We clarify the exact commitments depending on the project.

The finished app is your property, and ongoing costs only arise for hosting and optional maintenance. Maintenance packages start at a fixed monthly amount, and I bill later enhancements transparently at a fixed price per project. This lets you plan your total costs reliably over several years. You'll find the details on ongoing operations in my app maintenance offering.

If a standard solution covers your process well, it is usually the more affordable choice, and I'll tell you that openly. Custom development only pays off when standard software fails to cover your decisive workflow or when every adjustment ties you to a vendor. That is exactly what we check during discovery.

Book a free 15-minute initial call. Tell me about your idea, and I'll give you a first assessment of feasibility, timeline, and budget.