Custom software development?
Software that fits your business

From web applications and mobile apps to platforms and integrations: The Next App builds software that aligns exactly with your processes.

From €10,000 · Lead time 2–6 months · No-obligation introduction

Companies that trust us

Gemeente RotterdamMSD Animal HealthIncisionMove4UNederlandse Vereniging van BankenRadarQuookerHet WaterschapshuisMedimoGemeente RotterdamMSD Animal HealthIncisionMove4UNederlandse Vereniging van BankenRadarQuookerHet WaterschapshuisMedimo

10+ years of experience

We have been building custom software for leading organisations in the Netherlands for over a decade.

Web and mobile

From web applications and portals to iOS and Android apps. One team, one point of contact for your entire platform.

Code is yours

Everything we build, including the source code and repositories, is fully your property. No lock-in, no dependency.

★★★★★

What we build

What do we build as custom software?

The Next App builds a wide range of software solutions, depending on what your organisation needs:

  • Web applications and portals: customer environments, dashboards and management platforms that run in the browser.
  • Mobile apps: iOS and Android apps from a single codebase with Flutter, with native performance.
  • Backends and APIs: the engine behind your software, scalable server-side logic and integrations.
  • Middleware and integrations: connections between existing systems so data flows automatically.
  • Platforms and SaaS: complete multi-tenant software solutions serving multiple clients simultaneously.
Custom software: dashboard and platform
Cost of custom software development

Pricing

What does custom software development cost?

The price of custom software depends on the complexity, the type of solution and the required integrations. Key pricing factors:

  • Type of solution: a web application, mobile app or full platform each fall in a different price range.
  • Scope and functionality: how many screens, user roles and workflows does the software contain?
  • Integrations: does the software need to connect with existing systems like Salesforce, SAP or custom APIs?
  • Design: fully custom UI or building on an existing design system?

Indicative pricing: a simple software solution starts from €10,000. A fully developed platform with multiple roles and system integrations quickly reaches €30,000 to €100,000+.

Prefer a quick estimate? Call us: 010 307 6100

Our approach

How do we build your custom software?

Before we start building, we always honestly answer the make-or-buy question: is custom development really the right choice here, or does an existing package solve the problem too? If a standard solution is sufficient, we say so. If custom is the better choice, we explain why.

Intake and analysis

We start with a thorough intake session: what are the processes, who are the users, what systems already exist? Only once we understand this do we write a quote per phase.

Design and prototype

We design the user interface and build a clickable prototype. This lets you experience the software before a single line of code is written.

Build and deliver

We work in two-week sprints using Node.js or NestJS for the backend, Flutter for mobile apps and TypeScript throughout the stack. After each sprint you receive a working version to test. After launch we proactively advise on maintenance and further development.

The Next App team at work
Developer working on custom software

Why custom

What is custom software?

Custom software is software built specifically for your organisation — not an off-the-shelf package that you adapt to your way of working. The result: software that does exactly what you need.

Standard software packages are designed for a broad audience. As soon as your processes work slightly differently, you hit limitations or pay for features you never use.

  • Fully aligned with your processes, not the other way around
  • Source code is entirely yours: no lock-in, switching is always possible
  • No licence fees that grow as you scale
  • Connectable to existing systems like Salesforce, SAP or custom APIs

Get started

Ready to have your software built?

Let's grab a coffee. Tell us about your idea or challenge and we'll give you our honest take on what's possible — no obligation.

Our office is at Westblaak 33 in Rotterdam. We are happy to come to you or connect online.

Schedule a no-obligation call →
Meeting with The Next App team

Previous work

Custom software we built

View all cases →

More previous work

More custom software we built

FAQ

Frequently asked questions aboutcustom software development

When do I need custom software?

Custom software makes sense when standard packages don't fit your processes well, when you're paying for features you don't use, or when you have unique business logic you want to automate.

A good rule of thumb: if you regularly adapt yourself to the software rather than the other way around, it is time to consider the alternative.

What is the difference between custom software and an off-the-shelf package?

An off-the-shelf package is designed for a broad audience and requires you to adapt your processes to the software. Custom software is built specifically for your organisation: the software adapts to you, not the other way around. The result: more efficiency, no unnecessary features and no licence costs that grow each year.

The downside of custom software is the higher upfront investment. But long-term you have full control over functionality, roadmap and costs. You are not dependent on decisions made by a package vendor.

What does custom software development cost?

A simple software solution starts from €10,000. A fully developed platform with multiple user roles, system integrations and custom design quickly reaches €30,000 to €100,000+.

We work with a fixed daily rate and produce a detailed quote per phase, so you are never faced with surprises. After an intake session we have enough information to give you a realistic estimate.

How long does custom software development take?

A simple application is typically built in 6 to 10 weeks. A more complex platform with multiple user roles, integrations and an elaborate design takes 3 to 6 months.

We work in two-week sprints so you always have a working version to test and provide feedback on. This keeps the timeline manageable and prevents surprises at the end of the project.

Do you build both web applications and mobile apps?

Yes. We build both web applications (portals, dashboards, platforms) and mobile apps for iOS and Android with Flutter. Many of our projects combine both: a web application for administrators and a mobile app for end users.

Because we can do both, you have a single point of contact for your entire software solution. No need to coordinate between a web agency and an app agency.

Who owns the code?

You do. After delivery the source code is entirely yours. We always deliver in a repository under your name, so you can do with it as you please. You are never dependent on us if you ever want to switch to another agency or take the software in-house.

★★★★★

Ready to get started?

Let's grab a coffee. Tell us about your idea and we'll give you our honest take on what's possible.

Schedule a call →
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