How Long Does App Development Take? Real Timelines by Phase
The right question isn't "how long does an app take?" but "how long does THIS app take?" The phases of the process, real ranges by complexity, and the most common reasons a project runs months over.
March 7, 20234 min readIn this article
"How long will it take?" deserves the same honest answer as "how much will it cost?": it depends, but that "it depends" comes with concrete ranges and identifiable factors — it isn't a polite way of dodging the question. This article focuses only on timelines — for pricing, see how much app development costs. Here are the real phases of the process, how long each one takes, and what actually stretches a software project out.
The phases of a development project (and how long each takes)
| Phase | What it includes | Typical duration |
|---|---|---|
| Discovery and scoping | Defining the problem, the MVP, screens, and flows in writing | 1 – 2 weeks |
| UI/UX design | Wireframes, visual design, client validation | 2 – 4 weeks, often running in parallel with the start of development |
| Development | Building screens, business logic, integrations | The most variable phase: 4 – 16+ weeks |
| Testing (QA) | Testing flows, fixing bugs, validating on real devices | 1 – 3 weeks, often overlapping with the end of development |
| Launch | Publishing, setting up production, training the team | Days, unless store review is involved |
If the project includes native or hybrid apps, add store review time: Apple typically takes one to three business days per submission (sometimes longer if the first version gets rejected), and Google Play tends to be similar or a bit faster. It's not the main bottleneck, but it's one many timeline estimates forget to account for.
Realistic ranges by project complexity
| Project type | Typical timeline |
|---|---|
| Scoped-down web MVP | 6 – 10 weeks |
| Platform / SaaS version 1 | 10 – 20 weeks |
| Mobile app (hybrid, both stores) | 12 – 24 weeks |
| Internal management system | 8 – 16 weeks |
| Complex product / fintech / real-time | 20+ weeks |
These are the same categories used in the pricing guide, and that's not a coincidence: price and timeline grow together because they measure the same thing from different angles — the actual amount of work the scope demands.
What stretches projects out (more than the technology does)
The most common cause of a delayed project isn't technical difficulty — it's the coordination around it:
- Undefined or shifting scope: adding "while we're at it" features midway costs three times over, in time and in focus.
- Content and assets that don't arrive on time: copy, photos, and video are, in practice, the number-one cause of delay in projects that are technically well planned.
- Decisions that depend on too many people: without a single owner approving things, every decision turns into a round of emails.
- Third-party integrations that don't respond on time: payment gateways, accounting systems, or external APIs outside the development team's control.
- Store review rejections: for violating some policy, which adds an entire extra review cycle.
- Switching providers midway: the new team needs time just to understand what already exists before it can move forward.
How to shorten the timeline without cutting quality
- Define scope in writing before development starts. The right MVP — see what is an MVP and how to define it — is the single most effective lever for cutting timelines without cutting quality.
- Have content ready before it's needed, not requested mid-development.
- Name a single decision-maker on the client side, with real authority to approve without escalating every detail.
- Launch in phases: a version one that covers the essentials, and a version two built on real usage evidence, not assumptions.
- Prioritize a web app over stores when the case allows it: it avoids review time and double development — the full comparison is in native, hybrid, or web app.
At TheUIXstudio we work with visible deliveries every two weeks, precisely so a delayed project gets caught early instead of at the end. Our App & Startup Plan starts with a free technical assessment where we give you a realistic timeline based on your actual scope, not an optimistic number meant to close the sale. If you have a project in mind and want to know how long it would really take, let's talk.
Frequently asked questions
Why did one provider quote me 3 months and another 8 months for the same thing?
They probably didn't quote the same thing. Before comparing timelines, align scope screen by screen: it's common for each provider to have imagined a different product from the same initial description.
Does the timeline include changes I request during the project?
Usually not, depending on how the agreement is structured: each mid-project scope change extends the original timeline. Working in phases, with visible deliveries, helps control this because adjustments get seen and agreed on as they happen, not at the very end.
How long does Apple and Google's review take?
Apple typically responds within one to three business days; Google Play tends to be similar or a bit faster. The real risk isn't the wait — it's a rejection for violating some policy, which forces a fix and a resubmission, adding a whole extra cycle.
Can I speed up the project by paying for more people?
Up to a point. Adding people to a small team doesn't always shorten the timeline proportionally: each new person needs time to understand the project, and coordinating more people also takes time. Cutting scope usually pays off more than growing the team.