App development
Apps that reliably work in everyday use.
We build iPhone, iPad and Mac apps with Swift and SwiftUI — production-ready, data-frugal and with an interface that holds up in daily use. From the first idea to the App Store and beyond.
What we do
From the idea to a well-kept app
Consulting & concept
We clarify what your app must do — and what it shouldn't. An honest take on effort, platforms and a sensible feature set.
Native development
Swift and SwiftUI on the Apple platforms: fast, accessible, maintainable. No web containers, no compromise frameworks.
Privacy & performance
Data frugality as standard, smooth operation as the goal — both designed in from the start, not bolted on.
Publishing
App Store submission, review process, metadata, in-app purchases: we get your app cleanly into the store.
Ongoing development
After release it continues: new features, iOS updates, maintenance — plannable and personally supported.
Internal tools & AI apps
Tools for your team, customer apps or AI-powered features — including local, on-device AI.
Why Coolblack
We build products ourselves — not slides
The Coolblack phone agent is our own App Store app: on-device AI, telephony, in-app purchases, push, GDPR — all built in-house and running for real. That experience feeds straight into your project.
- Our own App Store apps — from the voice agent to a game
- 38+ years of Apple-platform experience
- Short paths: you talk to the developer directly
- Clear quotes instead of agency overhead
Let's talk about your app.
In a free initial call we clarify the goal, the scope and a realistic path to a first version.
Request a call