A typical custom app takes about 20 to 40 weeks: 2 to 3 weeks of planning, 2 to 4 of design, 3 to 6 months of development, 3 to 6 weeks of testing and 1 to 2 weeks for release, on one development firm's published breakdown. Clutch's data averages about 11 months. A focused MVP can launch in a few months.
What public sources say
Clutch's app cost guide (updated 21 September 2026), built from client reviews, puts the average mobile app project at about 11 months, with simple apps taking a few weeks and complex ones months or longer.
A Clutch article on app development timelines (updated 29 May 2026), written by an executive at a development firm from experience (it is not a survey), gives a typical timeline of 20 to 40 weeks and breaks it into phases.
The phases, and how long each takes
The breakdown in the Clutch timeline article:
- Planning and discovery (2 to 3 weeks): goals, users, features, platforms, integrations and a written scope.
- Design (2 to 4 weeks): user flows, wireframes and the visual design of each screen.
- Development (3 to 6 months): the app itself, the backend and the connections to other systems.
- Testing (3 to 6 weeks): functional, device, performance and security testing, overlapping development.
- Release (1 to 2 weeks): store listings, submission and review.
- Post-launch (2 to 4 weeks): fixes from first users, monitoring and the first update.
What makes an app take longer
Six things stretch most app timelines:
- More features in version one. Every feature adds design, build and test time.
- Two native apps. Separate iOS and Android codebases need more build and test time than one cross-platform codebase; our guide to Flutter vs React Native covers the shared-code route.
- Integrations. Payments, CRMs, ERPs and legacy systems each bring their own testing.
- Slow decisions. A week waiting for sign-off is a week added.
- Changing scope mid-build. Late changes undo finished work.
- Regulated data. Health, finance and children's apps need extra security and review.
App Store and Google Play review
Store review is short next to the build. Apple says its App Review typically reviews at least 50% of submissions in under 24 hours and 90% in under 48 hours. Allow time for a rejection and resubmission on the first release, and build with the current tools: Google Play's target API rules require new apps and updates to target Android 16 (API 36) from 31 August 2026.
Getting there sooner: the MVP route
A minimum viable product is the smallest version that solves the main problem for the first users. It cuts the feature list to what proves the idea, often ships on one platform or one cross-platform codebase, and can launch in a few months. Later features follow in releases, shaped by what users do. Our MVP development work is built around that route.
Does AI make app building faster?
AI coding tools speed up parts of development, such as boilerplate code, tests and first drafts of screens, and can shorten the build phase. They do not remove planning, design decisions, integration work, security review, device testing or store review, which take much of the calendar. Treat claims of a full app in days with care, and ask what was left out.
How to keep the timeline on track
Five habits that keep a build on schedule:
- Write the scope down before design starts, with what is in version one and what waits.
- Name one decision-maker on your side with time set aside each week.
- See working builds every week or two, from the first month.
- Keep a change log; move new ideas to the next release unless they block launch.
- Plan store accounts, privacy policy and listings early; they are not code, but they can hold up release.
Conclusion
A typical custom app takes about 20 to 40 weeks from planning to launch on one development firm's published breakdown, and Clutch's data averages about 11 months. Development is the longest phase at about 3 to 6 months. Scope, platforms, integrations and decision speed move the timeline most, store review usually takes a day or two, and an MVP gets a first version to users in a few months.
PromotEdge International is an international strategy, technology, marketing and design company, and our delivery team is in India. Our mobile app development team builds iOS and Android apps from design to launch, in your own store accounts, and our minimum viable product work gets a first version out sooner.
Facts we rely on: see our company facts for what we state about ourselves and where each fact comes from.