Mobile app development for iOS & Android.

Mobile app development means a studio builds you an application that people use on their phone or in their browser to do something: order, plan, measure, communicate or manage. The difference with a website is that an app revolves around the user's actions and data, not just showing information. That calls for a well-considered setup under the hood.

The price depends on what the app has to do and which platforms it has to run on. A focused first version with a clear core function is cheaper than an app with payments, notifications, an admin environment and integrations with external systems. We almost always advise starting small and good: a first version that really solves something, and then expanding based on what users do.

Our price ranges for mobile app development:

• Focused first version with one core function: from €18,000.
• App with payments, accounts and notifications: €30,000 to €60,000.
• Platform app with an admin environment and integrations: €60,000 or more, depending on the scale.

The most expensive mistake in app development is having two separate apps built for iOS and Android, with two teams and double the maintenance. We build with React and React Native, which lets you run on both platforms from one codebase. For many use cases we choose a progressive web app: then the app works in the browser and is installable, without you depending on the approval of the app stores.

Under the hood we work with TypeScript, so errors get caught before they reach the user. For our AI colleague Cor we built a work environment that serves multiple clients at once with strictly separated data. For the fitness app CalorForm we delivered a progressive web app with AI coaching, built in four phases into a platform with nearly two hundred tests. For Immersive Connect we built a wellbeing app that brings sport, care and day activities together.

Do I need a separate app in the App Store? Not always. For many businesses a progressive web app is faster, cheaper and simpler to maintain, because you do not have to wait for an approval round from Apple or Google for every change. If you do want to be in the stores, that is possible with the same codebase. What fits we decide based on your audience.

What you get with mobile app development:

• An app that works on iOS, Android and in the browser from one codebase.
• An admin environment where you manage users, content and settings.
• Logging on critical actions, so problems are traceable.
• A scalable backend that grows with the number of users.

Most app projects do not founder on the technology, but on a first version that is too big. Someone wants everything at once, the project overruns, and the first version is still not live after a year. We cut it up. First the core that truly delivers value, then expand based on what users actually do instead of what we assumed up front.

The step-by-step plan for mobile app development with us:

1. Defining which problem the app solves and for whom.
2. A design of the most important screens and the user flow.
3. Building the core function, with weekly demos where you follow along.
4. Testing on real devices, not just in a simulator.
5. Launch and following along the first few weeks on real usage.

How do I know if my app idea is feasible within my budget? We discuss that in a short conversation. We are honest about what does and does not fit. Better a sharp first version that really solves something than a half app with too many features that excels at nothing. Sometimes part of the idea turns out better built as a separate web page.

We take security and privacy seriously, certainly for apps with personal data. The Dutch Data Protection Authority publishes concrete guidelines on app development, see autoriteitpersoonsgegevens.nl. We build privacy and data protection in from the start instead of afterwards, because bolting it on afterwards is almost always more expensive and messier.

An app is never finished on launch day. Phones get updates, users do unexpected things and your own wishes change. That is why we deliver not just the app, but also the foundation to let it grow: logging so you see what happens, an admin environment so you can adjust things yourself, and a codebase a successor understands.

What ongoing maintenance of an app involves:

• Keeping up with new versions of iOS and Android.
• Monitoring errors, so you see them before users complain.
• Adding new features based on what users actually do.
• Scaling the backend when usage increases.

Maintenance is not a mandatory monthly fee you get nothing for. We make clear up front what it costs and what you get for it. For some apps a light subscription is enough, for a growing platform structured ongoing development makes more sense. Want an app that is more than a shell around a website? Take a look at our approach to app development and to multi-tenant SaaS when your app has to serve multiple companies or clients.