iOS, Android or both?
Native, cross-platform, Flutter or React Native: without a clear decision you get extra cost, delays and apps that work on one device but not the other.
We realised too late that we needed both stores.
Mobile App Development
iOS and Android app development from idea to the App Store
You have a business idea or want to optimise processes on mobile? We design, build and publish your custom app for iPhone and Android, native or cross-platform, with clean code and a clear project plan.
40+ apps in the store
iOS and Android
20+ years experience
Book a free intro call
Free and non-binding · No vendor lock-in · GDPR-compliant
The challenge
Why mobile app projects often fail
The idea is rarely the problem. Failure usually comes from unclear platform choices, store rejections or no plan after launch. We see these three hurdles regularly.
App Store and Play Store
Apple and Google reject apps for formal or technical reasons. If you do not know the review process, you lose weeks on fixes.
Google rejected us and we did not know why.
No plan after launch
Without maintenance, OS updates and documented code you depend on the agency or the app ages quickly.
After release nobody was reachable anymore.
What you get
What we build for your app
No theory overload. We work on your real project, with tools that work today.
Native and cross-platform
High-performance apps with Flutter or React Native, or native development as needed. One codebase, two stores when it fits.
UI and UX design
Wireframes and interface by us or from your Figma files, including corporate design, logos and colours.
Core features
Login via email, Google or Apple ID, push notifications, in-app purchases, Stripe, PayPal and hardware such as camera, GPS or biometrics.
Backend and cloud
Cloud data, sync across devices, connection to existing websites, databases and APIs.
App Store and Play Store
Account setup, review preparation, publishing and updates with Apple and Google, including common rejection reasons.
Maintenance and support
Updates for new iOS and Android versions, performance, security patches and further development as needed, communicated clearly.
How it works
Your app in the store in 4 steps
Transparent, predictable, with regular builds on real devices.
1
Intro call and analysis
We go through your questionnaire: platform, audience, features, design, backend, timeline and budget. You get an honest assessment in plain language.
2
Concept and design
Structure, wireframes and visual layout. You see early how the app is built before development starts.
3
Development with demos
We implement the design and deliver regular builds to test on iPhone and Android. Feedback is included right away.
4
Testing, launch and handover
Testing on multiple devices, store publishing, handover with documentation. No vendor lock-in.
Results
Numbers that back us up
No promises without proof.
40+
Apps in the store
iOS and Android
iOS and Android
20+
Years of experience
in app development
in app development
2
Platforms
Apple and Google
Apple and Google
100%
Support
until go-live
until go-live
★★★★★Our industry app runs stable on iOS and Android. Flutter was worth it, one codebase, two stores, well documented.
★★★★★The booking app was in both stores after eight weeks. Especially strong: support during the Apple review.
★★★★★Google had rejected us. The team fixed the issues, now the app runs with push and login without problems.
★★★★★Internal staff app with GPS and photo upload for our fitters. No more WhatsApp chaos on site.
★★★★★Startup MVP live in five weeks. Clear roadmap, fixed prices, we could show investors a real product.
★★★★★E-commerce app with Stripe and Apple Pay. Design by abssn, fast delivery, revenue runs through the app.
★★★★★Fitness app with training plans and push reminders. Store ratings are consistently positive.
★★★★★Communication at eye level, regular project updates. Exactly what we wanted from an agency.
Q&A
Frequently asked questions about mobile app development
Both. Depending on the project we recommend native development or cross-platform with Flutter or React Native. In the intro call we clarify what makes sense for your app and budget.
Simple apps start from around 300 EUR. Complex apps with login, backend, payments and hardware cost more. We work with fixed prices after a free intro call, with no hidden fees.
Simple apps are ready in 2-4 weeks. More complex projects with multiple roles, backend or AI need 4-24 weeks. You get regular builds on real devices.
Yes. We create wireframes and the full interface, or implement your existing Figma or Adobe XD designs. We include corporate design and branding.
Yes. We set up developer accounts, prepare review and guide publishing and updates with Apple and Google.
Yes. Email login, Google, Apple ID, push notifications, in-app purchases, Stripe and PayPal plus camera, GPS, Bluetooth and biometrics are standard for us.
Yes. We connect websites, databases and APIs so data syncs in the cloud and users see the same state on all devices.
Yes. Updates for new iOS and Android versions, bug fixes, performance and new features as needed. You get documentation and code without being tied to us.
Ready for the next step?
Send us your idea or completed questionnaire. We will respond with a clear assessment. Clients in Cologne, Bonn and remotely across Germany.
Book a free intro call
100% GDPR-compliant
Hosting in Germany
No vendor lock-in
Cologne · Bonn · Germany-wide