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How I export 1.2-gigapixel images on an iPhone without running out of memory

Rendering a big image on iOS is one of those things that looks trivial until your app gets killed by the OS mid-export. CGContext , draw, makeImage() …

A WWDC 27 Update on Building a Mac-assed App with SwiftUI

Weekly Dev Log 2026-W13

🗓️ This Week This week, I mainly focused on iOS development 📱. I also tested a small workflow using Codex: organizing ideas, creating a design file, a…

I built a native macOS terminal so I'd stop losing track of my AI agents

Once I started running Claude Code sessions in parallel, my bottleneck moved. The agents write the code. What slows everything down is me figuring out…

How screenshot detection works on iOS

Detecting a screenshot on iOS starts with a single UIKit notification. That is the last easy part. UIApplication.userDidTakeScreenshotNotification tel…

Stop Rebuilding the Same SwiftUI Components: A Guide to DesignFoundation

"I'll just write a quick button style... and a text field with validation... and a card component..." Two weeks later you have a bespoke design system…

Stop Rebuilding Auth, Onboarding, and Dashboards: DesignFoundationPro

Part 2 of 2. This tutorial builds on Part 1 — DesignFoundation core . If you haven't added the base package and theme yet, start there. The core packa…

How to Use FFmpeg with Swift (No Installation Required)

Originally published at ffmpeg-micro.com You need server-side video processing in your Swift app. Maybe you're building a Vapor backend that transcode…

I wanted to listen to lo-fi without switching to lo-fi playlists

I have playlists I like. Music I've saved, albums I come back to. And then I have the lo-fi study streams, which are a completely different thing you …

Swift Structs — Static Properties and Methods 🏛️

Sometimes you want data or functionality to belong to a struct itself, not to any individual instance. That's what static properties and methods are f…

Building an AI-Powered Photo Cleaner: Lessons from the App Store

Last year my iPhone popped the dreaded "Storage Full" notification for the hundredth time. I checked the breakdown: 68% was photos. Not memories — jun…

Taking apart the write path into another app's iCloud folder

I am going to take apart, layer by layer, roughly 90 lines of Swift that let my app write a single line into a file owned by a different app, inside t…

Building on-device Video Notes in a macOS app

Building on-device Video Notes: SpeechAnalyzer, Foundation Models, and libmpv in a shipping macOS app My macOS video player, Reel , has a feature call…

Things I Wish Someone Had Told Me Before Starting iOS Development

When I started learning iOS development, I thought the hardest part would be writing Swift code. I was wrong. The real challenges had very little to d…

Shipping a libmpv-based video player on the Mac App Store

Shipping a libmpv-based video player on the Mac App Store Most well-known mpv-based Mac players, including IINA, distribute outside the Mac App Store.…

Voice cloning models, measured across five languages

I benchmarked local voice-cloning models across English, German, Modern Standard Arabic, Spanish, and Mandarin Chinese. Models: OmniVoice int8 Chatter…

WWDC - 2026 - Build Intelligent Siri Experiences with App Schemas

In the iOS 27 release, Siri takes a real step forward. It can now reach into the actual content inside your app, take actions on your behalf, and unde…

I built one iOS app that controls four different Hisense smart-TV platforms — here's how each protocol works

The problem My Hisense remote died last year and I went down a small rabbit hole trying to find a single iOS app that worked across all the Hisense sm…

Swift Structs — Custom Initializers & the Power of self 🔧

Every time you create a struct instance — like AnimeCharacter(name: "Naruto", powerLevel: 9000) — you're calling an initializer . Swift generates one …

Watch a coding agent silence a Swift 6 data race instead of fixing it

Give a coding agent a Swift file that stopped compiling under strict concurrency, and a lot of the time it will make the build green by adding one ann…

Building AR Hide and Seek — Shipping a Solo Indie LiDAR Game to the App Store

The idea came from an extremely serious game of hide and seek with my cousins. We were adults, which made it ridiculous, but also strangely perfect. S…

Swift Structs — Building Your Own Custom Types 🏗️

So far we've been working with Swift's built-in types — String , Int , Bool , Array . But what if you need a type that doesn't exist yet? What if you …

How to add license keys to a SwiftUI macOS app (in under an hour)

You built a Mac app, you want to sell it outside the App Store, and now you need licensing: a key the customer enters, an activation that sticks, and …

I compared the licensing tools for my indie Mac app — the honest breakdown

I needed to license a macOS app I sell outside the App Store. I went down the rabbit hole so you don't have to. Here's the honest breakdown — what eac…

Adding Live Activities to a Pomodoro timer: what the docs don't tell you

A countdown timer is the perfect use case for Live Activities — and also a great way to discover everything the ActivityKit docs gloss over. When I ad…

How I auto-generate 800+ App Store screenshots across 39 languages and 3 devices

App Store screenshots are the highest-leverage marketing asset an app has — and the most painful to maintain. Now multiply that pain by 39 languages a…

I shipped a Pomodoro app in 39 languages as a solo dev — here's how i18n actually went

Most indie apps ship in English, maybe add a handful of "big" languages later, and call it done. I went the other way: Cadento , my SwiftUI Pomodoro/f…

iOS App Icon Sizes in 2026: The Complete Reference

Every time I ship an iOS app I end up re-looking-up the icon sizes, so here's the complete 2026 reference in one place — plus the part nobody tells yo…

Bringing Swift to the Apple II

Swift Closures — Accepting Functions as Parameters 🎯

So far we've been passing closures into functions that Swift provides — like sorted() , filter() , and map() . But what if you wanted to write your ow…