How Long Does It Take to Build a Mobile App?
Anyone who answers "how long does it take to build an app" with a single number, before knowing anything about the app, is guessing. The honest answer is a range, and the more useful thing to understand is what actually moves a project from the short end of that range to the long end - because that's the part you can influence.
Rough, realistic ranges
- A simple MVP - a handful of screens, one core workflow, no complex backend, built to validate an idea rather than serve as a finished product - typically takes somewhere around two to four months from a standing start to a launch-ready build.
- A standard business or consumer app - user accounts, a real backend with several data models, a handful of core features, reasonable design polish - usually lands somewhere in the four-to-seven-month range.
- A complex platform - real-time features, payments, multiple user roles, third-party integrations, or a marketplace connecting two sides of a transaction - commonly runs seven months to a year or more, particularly if it's launching on both iOS and Android with full feature parity from day one.
These are ranges for a single, focused version one, not for an app's entire life - every real app keeps evolving well past its first release, and that ongoing work isn't part of the "how long to build it" question in the first place.
What actually moves the timeline
How well-defined the scope is before development starts
Projects that start development with vague or shifting requirements almost always take longer than the same feature set would have taken with a clear specification up front, because ambiguity gets resolved mid-build instead of before it, which means rework. Time spent on planning and design before writing code is very rarely wasted time.
Native vs cross-platform, and one platform vs both
Building separately for iOS and Android roughly doubles a large share of the implementation work if done natively; a cross-platform framework like Flutter or React Native can bring that much closer to a single timeline for both platforms, though not perfectly identical, since some platform-specific work and testing remains regardless of the framework.
Backend complexity
An app that's mostly a frontend on top of an existing, stable API moves much faster than one that needs a backend built from scratch alongside it - user management, business logic, integrations, admin tooling. The visible app is often the smaller half of the actual engineering work.
Design maturity
Having finished, approved designs before development starts removes one of the most common sources of mid-project delay. Design and development running fully in parallel with a vague brief tends to produce rework on both sides once the gap between them becomes visible.
App store review
This is a smaller factor than people expect, but it's not zero - Apple's review in particular can take anywhere from under a day to over a week, and can bounce a submission back for fixes that need a resubmission cycle, especially for apps with payments, health data, or anything Apple scrutinizes more closely.
How to actually shorten a realistic timeline
The honest levers are: nail down scope and design before development starts rather than during it; launch a genuinely minimal first version and add features after real users are on it, rather than trying to ship every planned feature in version one; and pick native or cross-platform deliberately based on the app's actual needs rather than defaulting without thinking it through, since the wrong choice there can add months, not days.
Every mobile app development project at Burncode starts with exactly this kind of scoping conversation, because a realistic, specific timeline - not a generic industry-average guess - is what actually lets a business plan around a launch date with confidence.