Room-Inspired Local Persistence in Swift: A Production GRDB Architecture
Introduction If you've built Android apps with Room, you already think in a layered persistence model: entities define your schema, DAOs handle querie…
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How I Built an iPhone App and Published It on the App Store — With Kiro CLI as My Partner
Note: My English proficiency is limited, so I used GenAI (Kiro CLI) to help translate this post. This is the story of how I went from zero iOS develop…
Apple’s On-Device AI: The Quiet Revolution for Edge Computing and Local-First Apps
The story of AI for the last three years has been written in megawatts. Nvidia GPUs stacked in desert data centers . Models with trillion-parameter co…
I built an app where the AI invents its own generators
The premise started as a workplace joke: photograph someone and have an AI generate a fictional corporate manual about them. "Subject encountered in b…
Building an On-Device Training Strategy for Personalized iOS Apps
Machine learning on mobile devices is often associated with inference: download a model, run predictions, and return results. But what if the model co…
I shipped my first iOS app, got rejected twice, and built a tool so it never happens again
The code was never the hard part. The App Store review was. I shipped my first iOS app — a small baby tracker — and got rejected twice. Not for bugs. …
WWDC 2026 - Xcode 27 Ships With Apple's Own Agent Skills: What They Are and How to Use Them
At WWDC 2026, Apple did something specific and easy to miss in the flood of Siri AI headlines: Xcode 27 now ships with a set of agent skills that Appl…
Xcode 27: The Future of Agent-Driven Development is Here
For the first time, Apple is bringing production-grade AI agents directly into the IDE. This isn't just code completion on steroids. Xcode 27 integrat…
Swift Ternary Operator — Making Quick Decisions in One Line ⚡
We've covered if , else if , else , and switch — all great ways to make decisions in Swift. But there's one more tool in the toolkit that's much more …
OpenAPI, ORM, SVG and Lottie
This is the third follow-up to Friday's release post . Saturday's was about how you iterate; yesterday's was about new platform APIs in the core; toda…
Migrating a Real App to Swift 6: Data Races, a Dependency I Had to Evict, and the Compiler That Wouldn't Let Me Lie
Let me start with a confession: I have been writing concurrent code since the only tool in the box was a mutex and a prayer. After a decade of Swift I…
AI, OAuth, And Other Platform APIs In The Core
This is the second follow-up to Friday's release post . It covers the platform APIs that moved into the framework core this release. There are two hea…
On-Device Debugging And JUnit 5
This is the first follow-up to Friday's release post and it covers the two changes from this release that affect how you iterate on a Codename One app…
Building an unofficial Dumpert client for Apple TV with Swift 6 and SwiftUI
Dumpert is a Dutch video site I've watched for years, but there's never been an Apple TV app, so I built one. DumpertTV is an unofficial, open-source …
Как я избавился от тысяч строк валидации в Swift
Каждый раз, когда нужно добавить новую модель в проект, приходится писать буквально одинаковый код: с одинаковыми проверками, с одинаковыми корре…
Improving Your iOS Development Workflow with AI Skills
AI coding assistants have quickly become part of many developers' daily workflows. Whether it's generating boilerplate code, reviewing pull requests, …
Keep Spaghetti in the Kitchen, Not in Your Swift Code: Mastering SOLID 🍝
Hey iOS Devs! 👋 Don't get me wrong, I love a good plate of Spaghetti Carbonara. But when it comes to iOS development, spaghetti belongs in the kitchen…
React Native iOS Push Notifications: почему push не сохраняются в background/killed state
Разбираем очень неприятный баг в React Native + iOS: почему push-уведомления сохраняются на Android, но теряются на iOS в background/killed state. В с…
Building a Native QR/Barcode Scanner for React Native — New Architecture Ready
Most QR scanner libraries for React Native share the same problems — they're unmaintained, they don't support the New Architecture, or they pull in a …
# Giving an LLM Eyes and Hands on a Mobile Simulator
The interface a human uses When a person does QA in tapflow, the loop is: Look at the simulator screen Decide what to do (tap, swipe, type) Do it Look…
tapflow v0.3.x: Deeplinks, Keyboard Shortcuts, Screenshot API, and an Experimental MCP Server
Deeplink execution from the browser The one that came up most in real usage: testers frequently need to trigger deeplinks to verify specific app state…
I found the r/openclaw thread with 27 upvotes where someone gave an agent a real iPhone and now I can’t stop thinking about it
A few days ago I found this r/openclaw post: “I gave my agent my actual iphone..” It had 27 upvotes and 16 comments. That low number is exactly why I …
How iOS developers actually get paid: a practical guide to Apple's fiscal calendar
You ship your app. Sales start showing up in App Store Connect. And then you wait. The money doesn't arrive on the first of the month like a paycheck,…
Skills, Java 17, And Theme Accents
Last week was about Metal and the Skin Designer. This week the headline items are about what a brand new project looks like when you generate it: the …
Pragmatic Optimization in Mobile App Size: 3 Misconceptions
The Importance of Pragmatic Optimization in Mobile App Size In the world of mobile app development, I often see that app size plays a critical role in…
Apple Product Page Optimization (PPO) Guide for 2026
Apple Product Page Optimization (PPO) Guide for 2026 Apple Product Page Optimization is the single most underused growth lever on the App Store in 202…
iOS App Store Screenshots and Compliance: The Gotchas After Your Build Succeeds
This article was originally published on Jo4 Blog . Your EAS build succeeded. The IPA uploaded to App Store Connect. Time to submit for review, right?…
Swift Protocol Magic II: Designing a Reusable Location Tracking System
How to stop rewriting CLLocationManager boilerplate in every screen — and design something your future self will actually thank you for.* If you've sh…
Metal and Skins
This post has a lot to cover. Before we get to any of it I want to take on the uncomfortable subject first: quality. Two incidents from the past two w…
Building an AI-Powered Git Commit & PR Assistant
Every engineer loves writing code(On a good note, I believe 😉). Not every engineer loves writing: commit messages PR descriptions testing notes releas…