When you run the process effectively, you can get a professionally built app into users' hands within 14-16 weeks:
- Month 1 goes to strategy and design
- Development starts around day 30
- And a well-scoped MVP goes live within 8-12 weeks
It takes longer to build out the full product. But most of the work should happen after launching your MVP, with real users interacting with the product and giving you feedback.
Here's the good news - your timeline is mostly within your control. The biggest driver is how much you decide to build into the initial MVP, and how disciplined you stay about scope for the rest of the project.
In this guide, we'll break down the week-by-week cadence, the factors that impact timeline the most, and the most common pitfalls to avoid.
(We've spent 10+ years building mobile apps for brands like QVC, Black Rifle Coffee Company, and alice + olivia. If you'd like an experienced product team to help build your app, we'd love to learn more about your project.)
How Long Does It Take to Build an App?
People throw around all sorts of ranges - anywhere from 4 months, to a year or more. And while that's technically true, it's a bit misleading because it blurs two different questions together.
Building an app breaks down to two distinct parts:
- The first is getting an MVP (minimum viable product) into the market. Every MVP should be scoped to ship in 14-16 weeks max, which means being ruthless about feature prioritization. And cutting anything that doesn't need to be in the first version.
- The second part is everything that happens after your MVP is live. Building out the rest of your product vision in 2-week sprints, alongside your go-to-market strategy, marketing, user acquisition, user testing, etc.
Here's how the timelines break down. These tiers are exactly what we use when estimating cost:
Whichever tier your product falls in, the initial MVP should ship within 14-16 weeks. It should never take 6-12 months just to get an initial product into users' hands.
The rest of the product scope should get built after launching your MVP, with real users providing feedback, and with real data to make decisions based on - which is faster and produces a better product.
(The one exception is if you're building in a regulated space, or need heavy integration work to deliver the core value of the product. If that's the case, the first launch may take a bit longer. More on that in the factors below.)
The #1 Reason Project Timelines Balloon
What's the main thing that separates projects that launch in 16 weeks vs. the ones that seemingly drag on forever and never ship? Regardless of how big their product vision is, they start by building an MVP - the smallest version of the product that can prove (or disprove) that people want it, and that you're building the right thing.
No matter how experienced you are, every new product is built on assumptions. We make assumptions about the problem we're solving, who we're solving it for, and how much they care. And until you put a real product in real users' hands, you're just guessing.
The 5 Factors That Determine Your App Development Timeline
The timeline of every project is driven by the same handful of inputs. If you understand how they work, you can estimate how long things are likely to take, and make adjustments accordingly.
1. Scope (the Biggest Lever, by Far)
Scope is essentially how much software you decide to build.
Your timeline comes directly from the size of your feature list. And every feature has a cost that you can calculate in weeks. When we estimate a project, we list out all the features we're planning to build, size each one in terms of story points, and divide the total by how many points the team is able to complete per 2-week sprint.
Your MVPs should be scoped to 5-6 sprints worth of work, max. Treat the timeline as fixed and the scope as flexible. Pick the launch window, and then cut scope until the MVP fits 5-6 sprints worth of work.
2. Which Platforms You Build For
There are three ways to build a mobile app:
- Native iOS
- Native Android
- Cross-platform (one codebase that runs on both, using a framework like React Native or Flutter)
Each native platform has its own codebase, and building for two platforms takes quite a bit more engineering work. It's not quite 2x the work, since they share the strategy, design, and backend work, but the added time is roughly 1.5 to 1.75x a single platform.
If you decide to go cross-platform, you can build for both app stores with one single codebase, which can be faster. But there are tradeoffs. Cross-platform apps can feel less native, a mistake in your codebase ships to both platforms at once, and as your product scales, cross-platform frameworks struggle to keep up - and many features often end up needing to be rebuilt natively.
The fastest way to get to market is to build for one platform. Instagram ran iOS-only for its first year and a half. Typically the best move is to launch on the 1 platform where most of your users are, and then build the second platform when the traction justifies it.
3. Integrations and Compliance
This section may or may not apply to your app - it depends if you need to build integrations for 3rd party systems or if you're building in a regulated market (i.e. HIPAA compliance in healthcare).
In many cases, integration work doesn't need to be a blocker. If an integration isn't critical to testing your initial assumptions, and isn't part of the absolute core user flow, you can remove it from the MVP scope and build it in a future sprint, once you're live and users are requesting it.
However, some products don't have a choice. When you're building in a market where integrations or compliance work are at the center of the product, and it can't function without them, then you need to factor it into your timeline from day one. And if this is the case, your timeline may legitimately be longer than a typical build.
4. The Team You're Starting With
To build an app you need engineers, designers, product managers, and QA. And one of the biggest timeline factors is whether that team already exists, and how effectively they're able to ship product together.
If you already have a team in place, they can start making progress right away. But if you need to assemble one from scratch, that means months of recruiting before you're able to get started on anything. And hiring the wrong people can set you back months.
However you staff it, the question is how long will it take to get the full product team in place, ramped up, and working at full speed?
5. How Fast You Make Decisions
This one is simple. The faster you make decisions, the shorter your timeline will be. The team can only build as fast as decisions get made.
Engineering runs on two-week cycles, and each cycle requires decisions to be made. Which features are we building? What's out of scope? Which designs are approved? What comes next?
When those decisions get made right away, the project moves forward on schedule. But if each decision takes days, or weeks, the whole project will stall out - and the timeline will stretch by exactly that long.
This is a big reason strategy is important in the beginning. It's where you get ahead of some of those crucial decisions, so that by the time engineering starts, the user stories are fully specced with acceptance criteria that answers some of the product holes.
The Week-by-Week Timeline of a Well-Run Mobile App Build
Below is the calendar we run at Studio, phase by phase. (Our mobile app development process guide walks through each step in more depth.)
Week 0: Kick-Off
A two-hour meeting with every stakeholder in the room. This meeting has one purpose: to agree on what problem you're solving, the metrics of success, and the smallest version of the product you can build to test whether you're building the right product or not.
This meeting is not about coming up with features. This will come later.
Weeks 1-3: Strategy Sprints
Next, you'll go through roughly three 1-week strategy sprints to get a better understanding of the problem to be solved, and what to build for your MVP.
Before anyone designs a screen, you need to understand the people who have that problem - how they're solving it today, and where the current solutions fall short. So you talk to them directly through user interviews, map out the journey they go through to solve the problem right now, and look at what competing products are doing to solve the problem.
This process is where some of the biggest product wins happen. The pain points you uncover in this research will help you determine the feature set for your MVP. And oftentimes this process will uncover the fact that the real problem to solve was not what you initially thought it was.
Weeks 2-4: Design (Wireframes to High-Fidelity Mocks)
Design doesn't need to wait for the strategy work to finish. In the back half of the strategy sprints, once the core features have been decided on, the design team can get to work.
- Wireframes come first: these are rough, unstyled layouts of each screen in the core user journey. They don't need to have any colors or branding. They should just show boxes outlining what sections will go where on each screen, and how users will move between them. Wireframes are cheap and easy to change, so this is where you debate the flow and nail down how you want everything to work.
- High-fidelity designs come next: once the wireframes are signed off, design can turn them into the final, pixel-perfect screens with your branding and visual polish. These are what the engineers will build from - so the product manager should stay close to make sure everything designed is technically feasible.
At this stage you only need to design the core user journey. Things like onboarding, error states, smaller features, and edge-case screens can come later.
Week 4: Engineering Prep
Alongside the final design work, week 4 is where the feature set becomes an actual build plan. Four things happen this week:
- Break the features into user stories. A user story is a short, plain description of one thing a user can do (e.g. "a guest can unlock their door from the app"). Stories are the unit engineers build from - they should be small enough to complete in a single sprint, and specific enough that it's unambiguous whether it's complete or not.
- Estimate the stories. The team sizes each story in "story points," a ballpark measure of how much effort it will take. Since the team knows roughly how many points it's able to complete in every two-week sprint, you can use these points to estimate your timeline - total points for the MVP, divided by points per sprint, equals the number of sprints needed. That's your timeline, and because a build is priced by team and time, it's also your budget.
- Agree on the estimate before staffing up. Review and sign off on that estimate before the dev team gets started working. The purpose of this week is to understand what the project will cost and how long it will take before engineering begins.
- Load the first 3-4 sprints into the tracker. Add the user stories to your project board (Jira, Linear, or whatever tool you use), and prioritize them by the order you want to build them in. Only sprint 1's stories need to have finished designs attached right now. Design will keep working one sprint ahead, so sprint 2's screens will be designed while sprint 1's get built.
By the end of the week, sprint 1 is fully spec'd, the timeline and budget are agreed, and engineering can get started building with zero ambiguity.
Weeks 5-14: Engineering Sprints
This is where the app gets built.
The engineering team works in 2 week sprints. Each sprint starts with a planning meeting where the team commits to a specific set of user stories. And that scope gets locked, so nothing new gets added mid-sprint.
Each day the team checks in for 15 minutes to make sure nobody is blocked. And each sprint should end with a working build of the product that could be shipped. You should have the MVP finished within 5-6 sprints.
Beta Testing (Overlapping the Final Sprints)
Beta testing means putting pre-release versions of the app into real people's hands to catch bugs and points of friction before launching to the public. You can start beta testing while the last sprints are still running.
We suggest starting with the internal team, then expanding to more stakeholders, then a small group of real users, and finally a public beta or soft launch. Each group catches a new set of problems the previous group may have missed.
Weeks 14-16: MVP Launch
All the work you've done so far has built up to this moment! Once you launch your MVP you'll finally start to get real user feedback.
You can do your launch prep alongside the final sprint, so it doesn't add unnecessary weeks to the calendar. There are three jobs that need to get done:
- Set up product analytics (event tracking) so you can see what users do
- Prepare your app store listings (screenshots, descriptions, keywords, etc)
- Submit the app for review. App-store review usually takes a few days
Ongoing: Roadmap Sprints Toward the Full Product
Launching an MVP doesn't mean you're done. Once the product is live and you start getting feedback and data on how people are using the product, you can make adjustments to your roadmap and keep iterating.
Why App Projects Blow Past Their Timelines
Most project timelines balloon because of a few predictable issues. Almost everyone falls into these traps, and we've seen them play out dozens of times:
- Scope creep: the feature list keeps growing mid-project. This happens because building feels like progress, so features keep getting added. And every addition pushes the launch date out. The antidote is to lock scope for each sprint. New features should not be added mid-sprint, and re-prioritizing should only happen between sprints.
- Design by committee: every department that needs a say, and every stakeholder that needs to sign off, adds days or weeks to the timeline. New products inside big companies need a small team with real autonomy, and one empowered decision-maker who can say "yes" or "no" on the spot at sprint planning.
- The bargain rebuild: a lot of times when people hire the cheapest team, they end up with a product that can't ship, and then they have to start over from the beginning with a new team. "I spent $300K and I don't have a product I can take to market" is a sentence we've heard many times. Our article on the hidden costs of budget development breaks down why the cheap bid ends up being quite expensive.
- Running the process yourself: managing scope, sprints, design, and a dev team is a full-time job. Doing it on the side of your main job slows down the project and pulls your attention off the business.
- Polishing instead of shipping: waiting until the product feels "finished" before launching. If you're not embarrassed by your first release, you released too late. Real user feedback is worth more than another month of polish, and you can only get it by launching.
You can't plan your way to the right product ahead of time. You iterate your way there, and you can't start iterating until you ship.
Ready to Start Building Your App?
A well-run process gets your MVP into the market in 14-16 weeks. And the biggest factors that influence the timeline are decisions you control.
If you're looking for a senior team that can get you to market fast, and keep iterating and shipping with you after launch, that's exactly what we do with our clients at Studio.
We've designed and shipped apps for brands like QVC, Black Rifle Coffee Company, and alice + olivia - you can see our portfolio here. We work with you as if we were your technical co-founder. Think of us as your combined CPO and CTO, except we bring the design and engineering teams with us, and we can plug right in and make progress from day one.
If you'd like help estimating what your app's timeline could look like, book a call to talk to our team. We'll walk through your project and map out the calendar with you. (And if you're still comparing partners, our guide on how to choose a mobile app development company covers the questions worth asking.)