How long does app development take? Timeline from idea to launch
Realistic mobile app timelines: from an MVP in 8–12 weeks to a complex app with backend in 6–9 months.
App Development Duration
The short answer
App MVP: 8–12 weeks. Business app with backend: 4–6 months. Complex app (BLE/IoT, offline sync): 6–9 months – each including design, store review and stabilisation.
The short answer: a focused app MVP reaches the stores in 8–12 weeks, a full business app with its own backend typically takes 4–6 months, and complex apps with hardware integration (BLE, IoT) or offline synchronisation take 6–9 months. The decisive factor is rarely raw coding time – it is the volume of coordination, interfaces and app-store review cycles.
As a development partner with more than 250 delivered projects – made in Germany, based in Leer, East Frisia – we plan app projects in clear phases. With cross-platform technology such as Flutter, one codebase serves iOS and Android, cutting the timeline significantly compared with two native builds. For budgets, see the app development cost calculator; for the technology choice, see our Flutter vs. React Native comparison.
The phases of an app project on the timeline
| Phase | Duration | Scope |
|---|---|---|
| Concept & UX design | 2–4 weeks | Requirements, user journeys, clickable prototype and technical concept. The clearer this phase, the fewer loops later. |
| Development (MVP scope) | 6–10 weeks | Core features, backend or API integration, continuous testable builds. |
| Extended features & integrations | 4–12 weeks | Push notifications, payment, offline mode, hardware integration – the biggest lever on total duration. |
| Testing & stabilisation | 2–4 weeks | Device testing, beta phase (TestFlight/Play Console), bug fixing and performance tuning. |
| Store review & launch | 1–2 weeks | Apple and Google review, store listings, staged rollout. Apple reviews usually take 1–3 days; rejections cost an extra loop. |
What really drives app development duration
These factors decide whether your project lands at the lower or upper end of the range:
- Platform strategy: cross-platform (Flutter) saves 30–40% development time versus two native apps.
- Backend situation: existing APIs accelerate; a new backend adds 4–8 weeks.
- Hardware integration: BLE, IoT or sensor integration adds testing and certification effort.
- Client decision speed: fast feedback on interim builds is the most underestimated time factor.
- Store requirements: first submissions with login, payment or health data face stricter review.
Plan timeline and budget together
In a free initial consultation we clarify scope, milestones and realistic dates for your project – made in Germany, from Leer in East Frisia.
FAQ
FAQ: App Development Duration
How long does a simple app take to develop?
An MVP with a clearly scoped feature set is realistic in 8–12 weeks – including design, development, testing and store submission. Prerequisites: fast feedback cycles and no complex integrations.
How long does an app for iOS and Android together take?
With cross-platform frameworks such as Flutter, barely longer than for one platform, since both apps come from one codebase. Two separate native builds extend the project by 60–80%.
What delays app projects most often?
Late scope changes, unclear backend interfaces and slow internal decision-making. Store rejections add a review loop of several days each.
Can app development be accelerated?
Yes: an MVP approach with prioritised scope, cross-platform technology, reusing existing backend APIs and fixed weekly feedback slots. Adding more developers helps only marginally – communication overhead grows with team size.
How long does the app store review take?
Apple usually reviews first submissions within 1–3 business days, Google often within 24–48 hours. For apps with login, payments or health data, plan buffer for questions and a possible second submission.