Native iOS apps
Swift and SwiftUI, at home on iPhone, iPad and Mac.
App Development From sketch to App Store.
We design and build native apps for iPhone, iPad, Mac and Android, and web apps that feel just as quick. Then we keep them healthy, release after release.
What we build.
Android apps
Modern Android apps, level with your iOS app.
Web apps
Responsive and installable, for when the browser is the right place to be.
Product & UX design
Flows, screens and prototypes you can try on your phone before any code is written.
Backends & APIs
Accounts, sync, payments and notifications, ready to grow with your users.
Launch & care
App Store and Google Play submission, analytics, crash reporting and updates for every new OS.
Folio is our own app, down to the PDF engine. We build for you the way we build for ourselves.
Recent work.
Questions.
How much does it cost to build an app?
It depends on scope: the number of screens, the platforms and the integrations you need. After a short call we send a written proposal with a clear estimate, so you know what you're investing before any work starts.
How long does app development take?
Most focused first versions take a few months from kickoff to launch. You get a timeline before we start, and you'll have working test builds on your own phone every few weeks.
Should my app be native or cross-platform?
Native when performance and platform feel matter most; a shared codebase when budget and speed to market matter more. We'll recommend what fits your product and explain why.
Do you publish apps to the App Store and Google Play?
Yes. We handle developer accounts, review guidelines, store listings, screenshots and submission — and we deal with the reviewers.
Do you work with clients outside Rotterdam?
Yes. We're based in Rotterdam and work with clients across the Netherlands and worldwide, in English or Dutch.
rudi. is a technology studio.