// SERVICE 04 — APPS

Custom app development.

Native apps for smartphones and tablets — from the first concept to the finished installation. Lean, fast and free from hidden data collection.

What does app development mean with us?

Some processes do not belong at a desk but in a pocket: capture on the go, reminders at the right time, data at hand in the field. When no ready-made app exists for that — or the ready-made apps come with advertising, subscriptions and data collection — we build it: native apps for smartphones and tablets, from the first concept to the finished installation.

Native means the app runs directly on the device, starts fast and responds smoothly. Lean means: no trackers, no forced sign-up with third-party services, no features nobody needs. And honest means: if a web application is the leaner solution for your task, we will tell you in the initial consultation.

Who is it for?

For small and medium-sized businesses that want to map field service, warehouse or service processes on mobile — and for organisations with their own data protection requirements. Also for the public sector: because our apps work without data collection and without US services, they meet GDPR requirements by design.

How a project runs

Like every project with us, in four clear steps — described in detail on the process page.

/01

Listen

In the free initial consultation you tell us what the app should do. We say honestly whether a custom app is worth it.

/02

Fixed price

You receive a quote with a fixed price and a deadline. No open hourly budgets, no surprises.

/03

Build

We develop, test and install the app on your devices. Your employees get clear instructions without jargon.

/04

Support

After launch we stay available: maintenance, updates, new features — you stay in control.

Self-hosted & GDPR: what that means here in practice

Apps are often diligent data collectors: analytics services, advertising networks, synchronisation to third-party servers. Our apps do without all of that. Data that is only needed on the device stays on the device. If the app does need a connection — for example to your ERP — the other end runs on your own infrastructure, as described on the self-hosting page. That keeps the data path short, documented and GDPR-compliant.

Our own app Zerø shows how consistent this can be: the Android app against food waste stores the entire pantry locally on the smartphone — scan the barcode, capture the best-before date with the camera, get reminded in time, without a single piece of data leaving the device.

Typical use cases

  • Field data capture: record measurements, service reports or inspection logs directly on site — without paper and without retyping in the office.
  • Internal team apps: information that used to run via notes or chat chaos gets a lean, clear interface on the smartphone.
  • Data apps like Zerø: keeping track of stocks and deadlines — our app against food waste shows the principle in everyday life.
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// FAQ

Common questions about app development

For smartphones and tablets — natively, built directly for the respective device. Our own app Zerø runs on Android, for example. Which platform is right for your project is something we clarify in the initial consultation.

Not necessarily. Whether the app is distributed internally or published depends on your project — both are possible. We advise you honestly in the initial consultation.

After the free initial consultation you receive a quote with a fixed price and a binding deadline. No open hourly budgets — you know in advance exactly what it costs and when it will be finished.

As little as possible: our apps come without trackers and hidden data collection. What is only needed locally stays on the device. If a connection to your systems is needed, it runs on your own infrastructure — GDPR-compliant.

LET’S TALK. kontakt@quellcode-und-soehne.de →