How Long Does App Development Take?

An app takes 2–4 months for a simple tool, 4–7 months for a typical consumer or business app, and 8–14 months for complex platforms. The single biggest schedule variable is not code — it is decision speed and content readiness, exactly as with websites. And the single most common mistake is compressing QA and pre-launch phases, which just moves the timeline after launch, with interest.

Timelines by app complexity

• Simple app (5–8 screens, minimal backend): 2–4 months — tools, catalogues, calculators
• Typical app (accounts, backend, integrations): 4–7 months — feeds, commerce, booking
• Complex platform (realtime, marketplace, compliance): 8–14 months — fintech, on-demand, social at scale

Cross-platform (Flutter, React Native) shaves 30–40% versus dual-native by building once — the Flutter versus React Native guide covers the framework choice. India-based teams deliver the same calendar at 40–60% lower cost.

The phase breakdown (typical app)

• Discovery and design (4–8 weeks): flows, wireframes, design system, prototype — the discovery guide covers what proper scoping contains
• Development (10–20 weeks): the build, in weekly demo increments
• Backend and integrations (runs parallel, often the critical path): the invisible two-thirds of the work
• QA and stabilisation (3–6 weeks): real device testing, edge cases, performance
• Store submission and launch (2–4 weeks): review cycles, metadata, phased rollout — Apple review is typically 1–3 days but first submissions and rejections add weeks nobody schedules

What actually delays apps

• Decision latency: every week the review round takes is a week added to launch — the same law as websites
• Backend surprises: integrations with third parties are negotiation plus code, and the documentation lies occasionally
• Store review rejections: privacy disclosures, payment rules, metadata — first submissions with a naive checklist routinely bounce
• Content arriving late: onboarding copy, privacy policies, store assets — small things, blocking things
• Scope discovered mid-build: the MVP discipline exists precisely to prevent this

Speed versus cost, honestly

• Fast and complete: parallel teams cost more per week but finish sooner
• Complete and economical: sequential delivery takes longer at lower cost
• Fast and cheap: breaks — usually in QA, which is the phase that gets squeezed, and the bugs surface in reviews on the public store

Compressing the timeline honestly

• Cut scope, not phases: launch the core flow, iterate post-launch — v2 exists for a reason
• Cross-platform, one codebase: both stores from one build
• Weekly demos from week two: schedule problems surface while they are still cheap
• Store readiness from week one: accounts, privacy documents, review guidelines read before the design is final

For a phase-by-phase schedule with dates you can hold a team to, book a scoping call with your screens — the timeline follows the scope, and our mobile team quotes both together.