Mobile software factory: how to develop your app

Every corporate app starts with a good idea. The path is what gets complicated: scope that grows, deadlines that slip, an internal team split between the app and daily operations. Demand, however, does not slow down. Brazilians spent, on average, 5.02 hours per day on smartphone apps in 2023, according to Data.ai’s State of Mobile report, the highest figure ever measured in the country.

For companies that need to launch an app without building a mobile team from scratch, a mobile software factory is a direct alternative: the vendor takes over delivery, and your company follows the results. In this guide, you will learn how the model works, when it makes sense, how to choose the technology, what drives cost and timeline, and what to do after launch.

30-second summary

• What it is: a company that takes over the full app lifecycle (discovery, design, iOS and Android development, testing, release and evolution), with its own team and a formal commitment to deadlines and quality.
• When it pays off: when there is a recurring journey to simplify, field use, or a need for device features (camera, GPS, biometrics, notifications).
• How it works: discovery, architecture and design, sprint-based development, validated quality, deployment and ongoing support.
• Technology: native, Flutter, React Native or Kotlin Multiplatform; the choice depends on platforms, team and the user experience you want.
• Cost: depends on scope, platforms, integrations and contracting model; maintenance typically consumes 15% to 25% of the development cost per year.
• After launch: most users leave quickly; retention and ongoing support decide whether the app delivers returns.

What is a mobile software factory (and what it is not)?

A mobile software factory is a company that takes responsibility for delivering an app: discovery, architecture, design, iOS and Android development, testing, deployment and evolution. The client defines the business goal and follows deliveries and indicators, without managing developers.

The difference from other ways of getting an app lies in who answers for the result and who manages the team:

If you are weighing a factory against staff augmentation, the full comparison is in the post Software factory vs outsourcing: which to hire in 2026.

At NextAge’s Software Factory, you define the business goal, and a complete team handles discovery, architecture, design, development, testing, deployment and evolution of your app.

When does it make sense to build an app?

It makes sense when there is a recurring journey that can be simpler on a phone, a team that works outside the office, or a feature that depends on the device, such as camera, GPS, biometrics or notifications. Without proven demand, the investment tends to yield little return.

The most common scenarios in companies:

• Field teams: inspections, deliveries, maintenance and external sales, with real-time records.
• Customers and partners: self-service, order tracking, payments and loyalty programs.
• Internal operations: approvals, checklists and communication with employees who are not at a desk.
• New digital products: quick launch of a lean version to validate an idea in the market.

Not every need calls for an app. Dense administrative systems, such as finance, procurement or ERP, usually work better on the web. In some cases, a PWA (a website that behaves like an installable app) solves the problem at lower cost. If the problem has not yet been validated with users, the safest path is to start with a discovery phase and only then decide on the app.

How does app development work with a software factory, step by step?

In a software factory, the project follows five steps: discovery, architecture and design, sprint-based development, validated quality, and deployment with ongoing support. Typically, deliveries happen every two weeks, with a demonstration of what was built.

1. Discovery

Mapping of goals, users, processes, integrations and risks before any line of code. For an app, this step also defines the platforms (iOS, Android or both), the device features required, the systems the app will consume (ERP, CRM, payment gateways) and the success metrics. The result is a clear scope, a prioritized backlog and a realistic estimate of timeline and investment.

At NextAge, this step is Deep Discovery: less rework and fewer budget surprises.

2. Architecture and design

Definition of the stack, architecture, data model and clickable prototypes. This is where you validate the experience before development: screen flow, navigation, behavior on unstable connections, device permissions. Fixing a flow in the prototype costs far less than fixing it once the app is built.

3. Sprint-based development

Two-week cycles, each ending with a demonstrable version. You follow progress, adjust priorities and watch the app evolve. A typical team includes a project manager or Scrum Master, software architect, product owner, front-end, back-end and mobile developers, DevOps, UX/UI and QA.

4. Validated quality

Dedicated QA, automated testing and code review in every delivery. In mobile, this includes testing on real devices, different Android and iOS versions and varied network conditions.

NextAge’s Quality Center brings together dedicated QA, automated testing and AI-assisted code review in every delivery.

5. Deployment and ongoing support

Publishing to the stores (Apple App Store and Google Play), monitoring, documentation and an evolution plan. After go-live, the app needs fixes, improvements and adaptation to new operating system versions.

Native, Flutter, React Native or Kotlin Multiplatform: how to choose?

The choice depends on four factors: the platforms the app must serve, the profile of the team that will maintain it, the level of native experience required and your existing systems. No technology is better in absolute terms; there is only the one best suited to the project.

A few data points help calibrate the decision. According to JetBrains, Kotlin Multiplatform’s share among developers using cross-platform technologies rose from 7% in 2024 to 18% in 2025, and teams that adopt it share 40% to 80% of their mobile code (State of Kotlin 2026). React Native, in turn, made its New Architecture mandatory, narrowing the performance gap with Flutter (Adapty comparison, updated March 2026).

In practice, the recommendation should come from the project, not from the vendor’s preference. At NextAge, the stack is defined during discovery, among technologies such as Java, .NET, Node.js, Python, Angular, React and Flutter. To go deeper on Kotlin, see the guide to Kotlin app development.

How much does it cost, and how long does it take, to develop an app?

Cost depends on scope, platforms, integrations, security level, design and testing volume. Any number given without understanding these factors is a guess. To show how wide the spread is, global vendors publish ranges from US$ 15,000 to more than US$ 250,000 and from US$ 40,000 to more than US$ 400,000 for the same type of project.

What most often inflates the budget:

• Scope that grows during the project. McKinsey, in a study of more than 5,400 IT projects, found that large projects run on average 45% over budget and 7% over schedule, delivering 56% less value than predicted.
• Integrations with legacy systems. Each ERP, gateway or API adds development and testing time.
• Underestimated backend. The part users do not see often consumes the largest share of the budget.
• Ignored maintenance. According to Zoho, post-launch maintenance typically adds 15% to 25% of the original cost per year. Plan for it from the start.

One way to reduce risk is to choose the right contracting model:

Still unsure which format to choose? At NextAge’s Software Factory, the project starts with discovery, which produces a realistic estimate of timeline and cost and recommends the ideal format before development begins.

Security, privacy and quality from the first sprint

Security and privacy must be part of the project from the architecture stage, not after launch. Fixing a flaw with the app in production costs more and exposes user data, which, in the case of personal data, brings regulatory risk under Brazil’s LGPD (the country’s data protection law).

A minimum checklist for any corporate app:

• Privacy by design: collect only the data you need and record the legal basis for each processing activity.
• Robust authentication: secure login, role-based access control and session management.
• Encryption: data protected in transit and at rest.
• Protected APIs: authentication, rate limiting and input validation.
• Automated tests from the first sprint: functional, integration, performance and security.
• Code review: done by people, with support from AI tools.
• Monitoring and logs: to detect failures and incidents quickly.

At NextAge, the Quality Center and the NextFlow AI methodology combine human expertise and artificial intelligence at every stage of development.

What happens after launch?

After launch comes the part that most determines the app’s return: retaining users. Average Day 30 retention sits between 5% and 7%, according to data compiled by Phiture from Adjust, AppsFlyer and Business of Apps. In other words, the vast majority of users abandon an app within the first month.

Apps that stand out usually work on three fronts:

1. The first session. According to UXCam, users who complete a meaningful action in their first session are 2 to 3 times more likely to remain active on Day 30. Design onboarding to lead the user to that action.
2. Metrics tracked from day one: retention at D1, D7 and D30, completion of the main journey and crash rate.
3. Continuous evolution. New iOS and Android versions, changes in store rules and user feedback require regular updates.

After deployment, NextAge’s AMS Support handles fixes, improvements and continuous evolution of your app.

AI-powered apps in 2026: where they make sense

Artificial intelligence has stopped being a differentiator and become the foundation of many digital operations. In corporate apps, the most consistent uses are journey personalization, automated customer service and image analysis.

One example comes from a Brazilian insurer with a broad network of accredited partners. Claims assessment by in-person inspection was slow and expensive, with a waiting queue of up to 15 days. NextAge built a digital inspection platform in which the policyholder submits photos; a computer vision system identifies damage, estimates costs and automatically approves cases within the standard, powered by a historical base of 500,000 claims. The results published in NextAge’s case study: R$ 18 million in operating costs, +41% NPS and +23% fraud detection. These numbers reflect that specific project; each case depends on data, processes and scope.

Your app can be born ready to integrate NextAge AI agents, from process automation to customer service.

10 tips for developing your app

1. Validate the problem before thinking about screens. An app without proven demand is the most expensive mistake.
2. Define 3 to 5 success metrics before you start: retention, conversion, ticket reduction or time per task.
3. Start with an MVP (a lean version) with the feature that validates the idea.
4. Prototype and test with real users before coding.
5. Choose the technology based on the project, considering platforms, team and desired experience.
6. Plan the backend and integrations with ERP, payments and CRM from the beginning.
7. Require discovery, scope, acceptance criteria and SLA in writing.
8. Make sure code, repository and documentation are yours from day one.
9. Automate tests from the first sprint and test on real devices.
10. Reserve budget and team for ongoing support. The app only starts to be measured after launch.

How to choose a mobile software factory: 8 questions

Bring these questions to the first meeting with each vendor:

1. Is there a discovery phase before the quote?
2. Do you have a case similar to mine, with results in numbers?
3. Can I talk to two or three current clients?
4. Who from the team presenting the proposal will work on my project?
5. Are the professionals in-house? What is the replacement policy?
6. How often will we have deliveries and demos?
7. Is there dedicated QA and automated testing?
8. Will the code and repository be in my company’s name? What does support look like after launch?

For a more complete evaluation, with a scorecard and warning signs, see how to choose a software factory and the guide to the software factory contract.

Frequently asked questions

What is a mobile software factory?

It is a company that takes over the full lifecycle of an app: discovery, architecture, design, iOS and Android development, testing, deployment and evolution. The client defines the business goal and follows deliveries and indicators. Team management and accountability for the result stay with the vendor.

How much does it cost to develop an app with a software factory?

The investment depends on scope, integrations, platforms and contracting model. For this reason, NextAge starts with a discovery phase, which produces a realistic estimate of timeline and cost before development begins. As a reference, annual maintenance typically adds 15% to 25% of the initial cost.

How long does it take to develop an app?

It varies with the number and complexity of features, integrations and team size. A lean MVP takes less time than an app with multiple user roles, payments and AI. Discovery defines the realistic timeline; after that, deliveries happen every two weeks.

Software factory or in-house team to develop an app?

A factory is recommended when the company has a clear goal and no mobile team. An in-house team makes more sense when the app is the core product of the business and requires daily evolution. There is also a hybrid path: the factory delivers the first version, and the in-house team takes over afterward.

Flutter, React Native or native: which to choose for a corporate app?

It depends on platforms, team and desired experience. Flutter favors customized interfaces; React Native leverages teams with a JavaScript background; Kotlin Multiplatform preserves the native experience with shared code; pure native is recommended for intensive use of device features. Discovery recommends the most suitable option.

Does my company own the app’s code?

Yes. At NextAge, the intellectual property, source code, repository and documentation belong to the client, as set out in the contract. Require this guarantee in writing from any vendor.

Can the factory take over an app that already exists?

Yes. NextAge performs a technical assessment of the current system and can take over support, evolve the app or plan its modernization.

How do I follow the project’s progress?

Through deliveries every two weeks, review meetings, access to the project board and a dedicated point of contact.

Who publishes the app on the App Store and Google Play?

Publishing is a project step: the factory prepares the app, the materials and the submission to the stores. Ideally, the Apple and Google developer accounts should be in your company’s name, so the app is always yours.

After launch, who handles maintenance?

The same factory can take over ongoing support, with fixes, improvements and adaptation to new iOS and Android versions, or you can transfer maintenance to another team, as long as the code and documentation are yours.

Conclusion: where to start

If your business goal is clear but you do not have a mobile team, a software factory is the most direct path to bring your app to life with predictability. The starting point is always the same: understand the problem, define indicators, validate the experience and only then decide on technology, timeline and investment.

Your next app starts with a conversation. Talk to a NextAge Software Factory specialist and start with discovery: you leave the conversation with more clarity on scope, timeline and investment.

Read also: Software factory vs outsourcing | How to choose a software factory | Kotlin app development