How Long Does It Take to Build an App? Realistic Timelines for 2026

Short answer: A well-scoped MVP for iOS and Android typically takes 6–12 weeks from kickoff to App Store submission with an experienced developer. A tiny single-purpose app can ship in days. I built Drip, a caffeine tracker with AI logging, in three days. Content-heavy apps with video, community and integrations take 3–6 months. The biggest variable usually isn't coding speed. It's how quickly decisions, content and feedback arrive.

Typical timelines by app type

App type	Example	Realistic timeline
Single-purpose utility	Habit tracker, calculator, timer	1–4 weeks
Focused subscription MVP	Workout programs + player + paywall	6–12 weeks
Content + community app	Programs, video library, feed, challenges	3–5 months
Marketplace / two-sided	Coaches + clients, bookings, payouts	4–6+ months
Rebuild of an existing app	Moving off white-label or legacy code	6–14 weeks plus migration

These assume an experienced developer, cross-platform tech (React Native/Expo) and a client who makes decisions promptly.

What happens in each phase?

Discovery and spec (1–2 weeks)

Define the core loop, user flows and MVP scope, and name what's explicitly not in v1. Skipping this is the most common cause of a three-month build taking six.

Design (1–3 weeks, overlapping with build)

Wireframes, then high-fidelity screens. I work with designer partners in parallel, so engineering starts on data and infrastructure while the designs are finalised.

Build (4–8 weeks for an MVP)

Auth, data model, core screens, the main feature, payments, notifications and analytics. Weekly TestFlight builds so you can see progress and give feedback early.

Beta testing (1–2 weeks)

Put the app in the hands of 20–100 real users from your audience through TestFlight and Google Play internal testing. They'll find what you didn't think of.

Store submission and review (a few days to 2 weeks)

Store screenshots, descriptions, keywords and privacy declarations. Apple review usually takes 24–48 hours, but a rejection adds days. (Avoid common rejections)

What slows app builds down?

From over a decade of shipping, the delays are rarely technical:

Scope creep. "Can we just add a community feed?" Each "just" is a week or more.
Content isn't ready. The app is done but the exercise videos aren't filmed. For creator apps this is the number one delay. Start content production in week one.
Slow feedback loops. If reviewing a build takes a week, the project runs on weekly cycles instead of daily ones.
Decision by committee. One person should have final say on product decisions.
Third-party approvals. Developer account setup (Apple's organisation enrolment needs a D-U-N-S number and can take time), bank and tax forms for payouts, and API access requests. Start these on day one.

How can I launch an app faster?

Cut the MVP harder. Ship the core loop, then iterate. (What to cut)
Use proven building blocks. Expo for the app, RevenueCat for subscriptions, Firebase or Supabase for the backend. Don't build what you can rent. (Tech stack)
Set up developer accounts in week one.
Batch-produce content early while the app is being built.
Use over-the-air updates (Expo EAS Update) so small post-launch fixes ship in hours instead of waiting on review.

How did I build an app in three days?

Drip is a caffeine tracker: log a drink by photo or text, and see a live caffeine-decay curve that tells you when you'll be ready for sleep. It shipped in three days because:

The core loop was one sentence long.
I made every product decision myself, with no waiting.
I used a stack I know very well (Expo, React Native, Firebase).
I scoped ruthlessly. No social features, no web, no settings anyone wouldn't miss.

Your app probably shouldn't take three days, because a creator app carries content, brand and subscription complexity that Drip didn't. The lesson still applies: speed comes from small scope and fast decisions.

What happens after launch?

Launch is the start of the timeline, not the end. Plan for:

Weeks 1–4: bug fixes, onboarding tweaks, paywall tests
Months 2–3: first retention features based on real data
Ongoing: monthly releases, OS updates, content refreshes

See launching an app to your audience and the growth audit checklist.

FAQ

Can an app be built in a month?

A simple, focused app can. A subscription app with personalised programs, video and a polished design usually needs 6–12 weeks to do properly.

Does building for both iOS and Android take twice as long?

Not with React Native. One codebase serves both, and platform-specific work usually adds 10–20% rather than doubling the effort.

How long does Apple's App Store review take?

Most reviews finish within 24–48 hours, though first submissions and apps with subscriptions sometimes take longer or get questions from the reviewer.

Why do agencies quote longer timelines?

Agencies have more handoffs between project managers, designers and several developers. That adds coordination time. An independent developer has fewer handoffs, but also less capacity for very large projects.