From sketch to App Store release: iOS and macOS app development

By Roman Resenchuk,

From sketch to App Store release: iOS and macOS app development

In 2024, the App Store earned $103.4 billion (Business of Apps, July 2025), while the App Store ecosystem facilitated $1.3 trillion in billings and sales in 2024 (Apple, 2025 report). The platform pays, and the work of getting an app onto it is something I do for clients.

I am an iOS and macOS developer with experience since 2011. I am an entrepreneur with 10+ years behind me and over 100 launched apps. If you want to launch a new app, support an existing one, or expand your business, I can help bring the idea to life.

From sketch to App Store release

You bring an idea, even a rough sketch. I build the app and take it through to the App Store release.

I work on iPhone, iPad, Apple Watch and Mac apps. The stack is Swift, SwiftUI, UIKit and AppKit. If your app needs AI features, I add them with Apple Foundation Models, Vision and Apple Intelligence.

Fix what AI wrote for you

Some people build a first version with AI tools and then get stuck. The code runs in a demo and breaks in real use, or it never gets through App Store review.

I read what was written, fix it, and bring it to a state you can ship and maintain.

Support for your current app

If your app is already live, I can take over ongoing support. That covers fixes, updates and new features, so the app keeps working as iOS and macOS change.

Other work

Beyond apps, I build agentic AI systems: custom agent harnesses, autonomous long-running agents, multi-agent orchestration, and MCP tool integrations with OAuth and Cloudflare Workers.

Get in touch

Tell me what you want to build or what needs fixing. Write through the contact form.

Originally posted on LinkedIn.

  • ios
  • app-store
  • freelance

All posts