With a development agency or in-house team, a basic app takes about 3 to 6 months, a mid-level app with payments and integrations 6 to 9 months, an advanced app 9 to 12 months, and an enterprise-grade app 12 to 18 months or more, according to GoodFirms' 2026 app development guide. Clutch's pricing guide, based on its verified client reviews, puts the typical mobile app project at "about 11 months" (Clutch). No-code platforms and AI app builders are much faster to a first working version (days to weeks, and sometimes hours for a simple AI-built app), but nobody publishes benchmarked averages for them, so the figures for those rows below are our estimates, labelled as such. App store review adds days on top of any of these.
How long does it take to build an app? The short answer
| App type | Agency or in-house team (sourced) | Solo freelancer (estimate) | No-code platform (estimate) | AI app builder (estimate) |
|---|---|---|---|---|
| Basic app (login, profile, content, simple navigation) | 3 to 6 months | 3 to 6 months or longer | 2 to 8 weeks | Hours to days for a working version; 1 to 4 weeks to launch-ready |
| Mid-level app (payments, third-party integrations, real-time data) | 6 to 9 months | 6 to 12 months | 1 to 3 months, if the platform's limits allow it | 2 to 8 weeks |
| Advanced or enterprise app (multi-role, compliance, heavy integrations) | 9 to 18+ months | Rarely a one-person job | Often not a fit | Not well benchmarked yet |
Agency column: GoodFirms' complexity table (basic 3 to 6 months, mid-level 6 to 9, advanced 9 to 12, enterprise 12 to 18+), updated September 25, 2026. Other columns are Greta.sh editorial estimates; the reasoning for each is below. Checked October 12, 2026.
Why the estimates look the way they do:
- Freelancer: the same scope as an agency's basic app, but one person does design, frontend, backend and testing in sequence rather than in parallel, and their availability sets the pace. Agency survey figures assume parallel work (GoodFirms' older survey converted hours to weeks assuming two development stages run at once), so a solo build of the same scope rarely comes in shorter.
- No-code: you skip writing code but still design the data model, screens and workflows by hand in a visual editor. Bubble's own blog says builders can reach "fully functional V1s in days or weeks" (Bubble); that's a vendor claim, so our range is wider. Time goes back up when the app needs logic the platform's blocks don't cover.
- AI app builder: the first working version, with frontend, backend, database and login, can come from a single conversation; Zapier's 2026 roundup notes that vibe coding can produce "a very basic prototype in hours" (Zapier). Testing, edge cases, payments setup and real-user feedback take the rest of the time, which is why the launch-ready figure is weeks, not hours.
Average time to build an app: why sources disagree
Published averages range from weeks to more than a year, and most of the spread comes from what each source counts:
- Full project, kickoff to launch: Clutch's "about 11 months" and GoodFirms' 3 to 18+ months include discovery, design, development, testing and launch. A guide by the agency SOLTECH, published on Clutch, puts a typical mobile app at 20 to 40 weeks, split into planning (2 to 3 weeks), design (2 to 4 weeks), development (3 to 6 months), testing (3 to 6 weeks), deployment (1 to 2 weeks) and post-launch work (Clutch resources).
- Development effort only: an older, undated GoodFirms survey of 167 development firms converted reported hours into 4.5 to 11 weeks for a simple app, 7 to 16 weeks for a complex one and 11.5 to 26 weeks for an advanced one (GoodFirms survey PDF). Those figures assume 8-hour days, 5-day weeks and two stages worked in parallel, and they leave out calendar time spent waiting on decisions.
So if a quote says "six weeks" and another says "six months" for the same app, ask which one includes discovery, design, testing and launch.
How many hours does it take to develop an app?
Few sources publish hours directly. The older GoodFirms survey above reported hour ranges per stage, for example 30 to 80 hours for planning, 36 to 80 hours for UX design, 100 to 240 hours for infrastructure and 48 to 130 hours for testing, before any feature work. To turn a calendar estimate into hours yourself: one full-time developer works roughly 160 hours a month, so a 3-month basic build by a two-person team is on the order of 1,000 person-hours. That is arithmetic on the ranges above, not a measured average.
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What actually determines the timeline
Every estimate is a range, and the width of that range comes down to a handful of concrete factors, not vague "complexity":
- Backend needs. A static content app is a different project than one with user accounts, a real database, payments, and permissions. Auth and data modeling are where timelines quietly balloon.
- Number and depth of integrations. Stripe, a CRM, a mapping API, SMS: each third-party service adds setup, testing, and edge cases (webhooks, rate limits, error states) that rarely show up in the initial scope.
- Number of user roles / workflows. A single-user tool ships faster than a multi-sided marketplace with admin, buyer, and seller views.
- Design fidelity expected. A functional MVP and a pixel-perfect, animated product are not the same timeline, even with identical features.
- Compliance and data sensitivity. HIPAA, SOC 2, or payment-handling requirements add review cycles no build method can fully skip.
- Team continuity. A single freelancer's calendar, a dev shop's staffing bench, or one founder using an AI builder all have different failure modes for delays.
Our own take on scoping this correctly before you build anything is in what is an MVP: most timeline blowouts trace back to unclear scope at the start, not slow execution later.
Don't forget app store review
If you're shipping a native mobile app, the stores add time that no build method avoids:
- Apple App Store: Apple says it reviews "at least 50% of submissions in less than 24 hours and 90% in less than 48 hours" (Apple). Rejections restart the clock.
- Google Play: reviews "can take a few hours or up to seven days (or longer in exceptional cases)" (Google Play Console Help).
- New personal Google Play accounts: accounts created after November 13, 2023 must run a closed test with at least 12 testers opted in continuously for at least 14 days before applying for production access (Google Play Console Help). Budget at least two weeks for that alone.
A web app skips all of this: it is live when you deploy it.
What realistically slows any of these down
The build method changes the starting speed, not immunity to these:
- Scope creep. "While we're at it, let's also add..." is the single biggest timeline killer at every tier, from agency contracts to AI-assisted solo builds.
- Unclear specs. Teams (and AI tools) build what you tell them, not what you meant. Time spent clarifying scope up front is rarely wasted; time spent guessing usually is. Our pre-build planning checklist covers what to write down before you start.
- Review and feedback cycles. Every round of "can we change this" adds real time, whether the reviewer is a client, a stakeholder, or just you second-guessing your own product.
- Third-party dependencies. Waiting on API access, payment processor approval, or app store review isn't optional lag; it happens regardless of build method.
- Team communication overhead. Larger teams don't always move faster; coordination cost is real.
- The gap between "working" and "launch-ready." Getting a demo to work and getting a product ready for real users (error handling, edge cases, security review) are different amounts of work, and this gap is easy to underestimate with any fast-build method, AI-native tools included.
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Where Greta.sh's speed claims fit into this range
Greta.sh is built for the fast end of the AI app builder column: going from a plain-English prompt to a working full-stack app (frontend, backend, database, and auth included) without assembling a separate team for each layer.
Two honest caveats:
- Specific speed multipliers or "X days saved" figures for Greta.sh builds should be treated as directional, not guaranteed.
- Like every AI app builder, greta.sh compresses the "get to a working version" phase most dramatically. Testing, real-user feedback, and hardening for launch still take real time on top of that: the tool changes where your time goes, not whether launch-readiness requires any.
We've written more on how AI builders change the MVP timeline specifically in The end of the MVP: how AI builders skip to v1, and on what this has looked like for real founders in founders shipping MVPs 10x faster with greta.sh, including the parts that are genuinely fast and the parts that still take work. Time and money move together; our guide to how much it costs to build an app covers the cost side by build method. If you're weighing a no-code tool against an AI builder, no-code app builder vs AI app builder explains the difference.
If you're still choosing what to build, our list of 16 apps to make, ranked by how hard they really are sorts ideas into weekend builds, real MVPs and full products.
Frequently asked questions
How long does it take to build an app?
With an agency or in-house team, about 3 to 6 months for a basic app, 6 to 9 months for a mid-level app with payments and integrations, and 9 to 18 months or more for advanced and enterprise apps, per GoodFirms' 2026 guide. Clutch's pricing guide puts the typical mobile app project at about 11 months. AI app builders and no-code platforms reach a first working version far sooner, in hours to weeks, though launch-ready still takes longer.
What is the average time to build an app?
It depends on what's counted. Full projects from kickoff to launch average months: Clutch says about 11 months for a typical mobile app, and a SOLTECH guide on Clutch says 20 to 40 weeks. Surveys that count development hours only come out shorter, at several weeks for a simple app.
How many hours does it take to develop an app?
An older GoodFirms survey of 167 firms put individual stages at tens to hundreds of hours each (for example 100 to 240 hours for infrastructure). As a rough conversion, one full-time developer works about 160 hours a month, so a 3-month build by two people is on the order of 1,000 person-hours.
How long does it take to build an app with AI?
A first working version of a simple app, including a backend, database and login, can come from a single session with an AI app builder; Zapier notes vibe coding can produce "a very basic prototype in hours." Plan on weeks, not hours, to get to launch-ready, because testing, edge cases and real-user feedback still take time. No vendor publishes a benchmarked average, so treat any precise figure as a claim.
Is AI app-building actually faster, or just faster to a rough draft?
Both. AI app builders shorten the time to a working, clickable version dramatically. The time to take that version to a hardened, launch-ready product is less well documented; that phase still takes real effort, usually less than starting from zero with hand-written code.
Does app store review add time?
Yes, for native mobile apps. Apple reviews at least 50% of submissions within 24 hours and 90% within 48 hours; Google Play reviews can take up to seven days or longer in exceptional cases; and new personal Google Play developer accounts must first run a 14-day closed test with at least 12 testers.
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Last updated: October 18, 2026. Sources re-checked October 12, 2026.
