--- type: Service title: 'App Development — Flutter Developer Berlin | khal.it' description: 'Get your app built by a Flutter developer in Berlin. iOS & Android from one codebase. MVP in weeks, transparent process, clean handover. Free intro call.' url: https://khal.it/en/leistungen/app-entwicklung locale: en timestamp: '2026-06-01' tags: ['app-development', 'flutter', 'mobile'] --- # App Development — Flutter Developer Berlin | khal.it Flutter development for companies — from idea to the stores, for iOS and Android. One codebase, one developer, no lock-in. ## Step by step — no lock-in. ### Intro call - **Duration:** 30 min · free - **Deliverable:** We clarify your idea, the rough scope, and whether we're a fit. You get an initial assessment of feasibility and timeline. ### Scope & specification - **Duration:** 1–2 weeks - **Deliverable:** The idea becomes a clear, written specification: features, screens, data model, and a concrete offer with a fixed price or timeline. ### Development - **Duration:** Weeks to months - **Deliverable:** I build in short iterations — you see working builds regularly, give feedback, and always have visibility into progress. ### Testing & launch - **Duration:** 1–2 weeks - **Deliverable:** Testing on real devices, store setup, screenshots, and submission. I support the release on Apple and Google until approval. ### Handover & maintenance - **Duration:** optional · ongoing - **Deliverable:** Documented, maintainable code is handed over to you or your team. On request, I stay on as a mobile partner with fixed capacity for updates. ## FAQ ### What does it cost to have an app built? It depends on scope. An MVP with core features costs significantly less than a mature platform with many integrations. Instead of a flat rate, you get a concrete, project-specific estimate in the free intro call — transparent and traceable. ### Do I get an app for iOS and Android? Yes. Thanks to Flutter, both come from a single codebase. This saves time and budget because features are built and maintained only once — and both platforms stay in sync. ### Do I need technical knowledge? No. I translate your idea into a clear specification and explain every decision in plain language. You make the product decisions, I handle the tech. ### What if I need changes after development? No problem. The code is documented and handed over maintainably — you're not tied to anyone. On request, I support the app on a retainer with fixed monthly capacity for updates and new features. ### How are you different from an agency? You work directly with the developer who builds — no middleman, no markup, short paths. No project management overhead, no rotating contacts, no lock-in after handover. ### Can you improve an existing app? Yes. Whether performance, new features, a redesign, or resolving tech debt — I get into existing Flutter projects and move them forward cleanly. ### What should I look for when choosing an app developer? Experience with your type of app, a clear process, and handover-ready code. Whether they call it coding, developing, or building — the terms mean the same thing. What matters is that architecture, communication, and documentation are solid. ### Should I hire a developer or build the app myself? If app development isn't your core business, building it yourself is rarely cost-effective. An experienced freelancer ships faster, avoids common pitfalls, and hands over a codebase your team can maintain independently — no lock-in. ### Do you also handle push notifications and post-launch optimization? Yes. App development doesn't end at launch — engagement, retention, and smart notification systems are part of the architecture work. I designed a push notification framework for MediaMarktSaturn across 13 countries. Read the full deep dive on how we approached it.