Make your idea
mobile

A good plan is one thing; a slick mobile app — that runs smoothly on both iOS and Android and is easy to maintain — is another. Spartner blends years of experience with smart AI tools to make mobile app development faster, more scalable and, frankly, more enjoyable. Together we decide whether your solution will yield the highest return in the App Store, Google Play or as a WebApp, and then we continue building from a single codebase.

Apps without detours

What will it deliver?

Four concrete benefits you'll notice tomorrow

Automate

Bespoke processes move from Excel and email to a single app. Fewer errors, less frustration, more time for work that matters.

Integrate

We link your new mobile app directly to existing APIs or ERPs. Your data remains a single source of truth, helping you sleep better at night.

Scale

Thanks to cross-platform frameworks we maintain one codebase for iOS and Android. Updates roll out simultaneously—without double costs.

Innovate

Our AI-driven components spot usage patterns. We translate those insights into new features before the competition even wakes up.

An app is like a Swiss Army knife.

Compact, versatile and always at hand

The Swiss Army knife principle explained

The Swiss Army knife principle explained

You carry it everywhere, use only one or two functions a day, yet at crucial moments that knife suddenly becomes indispensable. A mobile app works exactly the same. Below we show how Spartner keeps that blade razor-sharp—and why clients often return after the first release to add extra tools to the same handle.

Sharpness first, then shine

Practice shows that a minimal viable product is less about features and more about focus. What I observe is that teams who start with a strictly defined core iterate faster later on.

Continuous honing with data

We integrate Firebase or App Center so real-time statistics pour in. At a glance you see which screens snag and which flows leak.

  • Small iterations prevent expensive refactors

  • One shared backlog keeps everyone on course

  • Automated builds shorten the "idea-to-app-store" cycle

How do we navigate your app journey?.

Theory is fine, but value emerges in execution. Follow these four steps for a flawless mobile launch.

Step 1 — Concept & validation

Step 1 — Concept & validation.

Before we touch a single line of code, we test assumptions. Interviews, sketches, sometimes even a cut-out cardboard mock-up: whatever it takes to see whether the target user is actually waiting for it.

Step 2 — Choose architecture

Step 2 — Choose architecture.

Native Swift/Kotlin? React Native? Flutter? There is no holy grail, but there is a best choice for your context. We lay the options side by side, including maintenance impact and community support.

Sub-step: Co-design security — OAuth2, Keychain, biometric login — we safeguard it from the start.

Step 3 — Build & integration

Step 3 — Build & integration.

This is where the magic happens. Thanks to AI-assisted coding we generate repetitive boilerplate so developers can focus on business logic. In practice this often saves 20–25% development time—subject to complexity, of course.

Step 4 — Test, refine, deploy

Step 4 — Test, refine, deploy.

We automate unit, UI and smoke tests. Then we push in one go to TestFlight, Google Play Internal Testing and—for the web variant—to a staging URL. Learn, tweak, go live.

Ready to accelerate mobile?

Ready to accelerate mobile?

Leave your details or simply give us a call. We will brainstorm freely about what "having a mobile app built" can mean for your business. No sales pitch, just an honest conversation about opportunities, pitfalls and the fastest route to impact.

A philosophical view on mobile

A philosophical view on mobile

Why an app is more than software

A mobile app is an extension of human behaviour. People reach for their phone reflexively when bored, in need or curious. As I mentioned earlier, this creates an opportunity to position processes very close to the user.

The device as context

Sensors, GPS, camera, haptic feedback—these features turn a smartphone into a context machine. Used well, an app feels almost personal.

The ethics of push

Notifications are powerful but addictive. We apply "notify only when helpful" so we do not create irrelevant noise.

Practical tips for your briefing

Practical tips for your briefing

How your project document moves with the sprint

  • Describe one main use case in "I want to…" format

  • Add wireframes, even if they are pencil scribbles

  • List external systems with contacts

  • Think about support scenarios: what if something breaks?

Budgeting without a crystal ball

We often work with a feature estimate plus a change buffer. That said, no two projects are identical.

Reusing design tokens

Choose colours, typography and spacing in design tokens so both the web and mobile app keep exactly the same look, strengthening your brand.

Looking ahead to 2025 and beyond

Looking ahead to 2025 and beyond

Three trends you can leverage today

AI-powered personalisation

On-device machine-learning models enable offline personalisation. Think of health apps that analyse patterns locally.

Super apps in Europe

They are already huge in Asia; Europe is now opening up to niche super apps. Opportunities exist for sectors such as mobility and energy.

Instant-install WebApps

Google is pushing Progressive Web Apps even harder. For certain use cases, the need to budget separately for "building an iOS app" and "building an Android app" disappears.

Hans Lugtenberg

"A deal is a deal"

Yield.inc is a new asset manager in the Netherlands that focuses on excellent customer experience, sustainability and technology. When faced with the question of whether to develop our platform in-house or with a partner, we got in touch with Spartner. We are still 100% behind the choice for Spartner because we own the source code and with Spartner, a deal really is a deal, whether it concerns the delivery date or the agreed budget!

Hans Lugtenberg Partner at Yield Inc.

Norbert Wegter

"A professional software partner since 2010"

Spartner is involved and contributes in our search for innovations and always delivers top-notch work. After the first Huurda.nl version got out-dated, we collaboratively launched a completely new version in 2020.

Custom-built search engine for rental properties

Norbert Wegter Owner of 123wonen and Expat Homes Holland

"Doijer & Kalff"

After transferring our D&K portal to Spartner, we have elevated the further development and continuity to a higher level. Although the D&K platform was originally developed internally, our technical expert can now focus on other innovations within Doijer & Kalff. Spartner provides the quality we need without excessive costs. They have seamlessly taken over the care of our portal, allowing us to benefit from a flexible capacity that perfectly aligns with our future plans and innovation goals.

Reinier van Bergen Managing Director at Doijer & Kalff

Jurjen Terpstra

"Pragmatic and flexible collaboration"

Spartner has created a customized portal for us for the accountability of large-scale collaborative projects. This enables us and our partners to execute and account for their plans in a shared environment that is secure, transparent, and manageable. The pragmatic and flexible collaboration with Spartner has ensured that we have quickly achieved a functional and user-friendly environment.

Jurjen Terpstra Managing Partner at Wecreate Consulting

Marco Caspers

"AI and machine learning as legal tools"

In 2020, we transferred the development of Lynn to Spartner. As a result of their fast development process, the Lynn platform achieves an increasingly central role in the legal world.

Lynn, the smart AI legal robot

Marco Caspers Software Development Manager at Lynn Legal

Bjorn Gubbels

"As a business you must dare to move forward"

Innovation and change are not always welcomed with equal enthusiasm by our employees, man is a creature of habit but as a company you have to dare to move forward and the need for a contemporary drawing program for the realization of various constructions with our Masterbloc bricks was high. For us but also for Spartner, this challenge was a bit of pioneering and together we had to overcome some hurdles to arrive at a beautiful and efficient business tool. A development and learning process for both parties, in which the feedback of questions and desired adjustments by our employees to Spartner was always in good consultation and we could count on quick feedback and targeted solutions. We continue to exchange experiences with Spartner and look back and forward to a successful collaboration.

Powerful 3D construction drawing software

Bjorn Gubbels Owner of Masterbloc

Marco Leenders

"Spartner extends our capabilities and development capacity"

With weekly calls, using our Azure DevOps sprint system, Spartner actively works together with our innovation, communication and software development departments.

Multi-website CMS with Statamic 3

Marco Leenders Head of Automation

Josh Mountain

"Have been using Laravel Excel for years"

We requested custom help to a performance challenge we had in our implementation of Laravel Excel. I was amazed how quickly these Laravel artisans achieved significant performance gains, which saved us a lot of development time.

Open source package for Laravel

Josh Mountain Co-Founder at IncentivePilot.com

Maurice Evers

"Higher occupancy rate thanks to our user-friendly platform"

Throughout the great years that we cooperate with Spartner (previously Maatwebsite, Ed.), our software has been developed continuously. Students and landlords actively work with features like allocation, payments, chat, contract generation and more.

Custom built ERP for all student residences

Maurice Evers Head of Student Housing Department

Maarten Bremer

"Innovating in the digital identification network of The Netherlands and Europe"

The pro-active approach of Spartner was crucial in understanding the complexity of the eHerkenning network.

Development of eHerkenning connection and services

Maarten Bremer CTO / Founder Ensured

Niels Winters

"Innovation in legal technology"

As jurists with knowledge of IT, we highly value quality; within code, but also in process. The high work-level and trustworthiness of Spartner gives us the capacity to continuously create innovative features.

Legal tech platform

Niels Winters Managing Director JuriBlox

Frequently asked questions

Practical answers to the questions we hear most often.

Why should I have a mobile app developed if I already have a responsive website? 🙂

A website is fine for search traffic and occasional use, but it lacks device features such as push notifications and offline storage. An app sits literally on the user's home screen and shortens the distance between action and result. In addition, biometric login lowers the barrier for repeat use.

Is cross-platform always cheaper than native? 🤔

Not necessarily. Cross-platform saves on duplicated code, but some complex hardware features still require native modules. We first analyse your backlog, then choose the most cost-efficient route.

How long does it take before my app is in the App Store? ⏳

Apple's review can take anywhere from 24 hours to a week, depending on the workload and whether your app falls into sensitive categories. By following their guidelines early you avoid rejections.

Can I add a WebApp version later on? 💡

Absolutely. In fact, we account for it from day one. With a shared API layer you can translate functionality to the web without rewriting business logic.

How much does mobile app development cost at Spartner? 💶

We deliberately do not give standard prices—every app is unique. During a free consultation we outline realistic ranges, including maintenance.

Can I prioritise features myself during the build? 🙌

Please do. We work in short sprints in which you provide feedback after each iteration. This keeps the project aligned with your business goals.

How secure is an app with AI components? 🔐

AI adds no extra risk when you have the basics in place: encrypted storage, secure models and clear data flows. We use privacy-by-design as a foundation.

What if I want extra platforms, like wearables? ⌚

We build modularly. Parts of the code—authentication, data modelling—can be reused for watchOS or Wear OS. Saves time and money.

Feel like a cup of coffee?

Whether you have a new idea or an existing system that needs attention?

We are happy to have a conversation with you.

Call, email, or message us on WhatsApp.

Bart Schreurs
Business Development Manager
Bart Schreurs

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