My wife convinced me to finally ship the app we’ve been using for years
My wife and I have been using a shopping list app I built for ourselves for a few years now. Not because I'm a genius product designer. Not because I …
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6 Cybersecurity Tips for Developing a Crypto iOS App
Building a cryptocurrency application for iOS today is fundamentally different from shipping a regular fintech product. The stakes are existential. A …
iOS 26 SDK Is Now Mandatory — Here Is What Actually Changes for Your App
Starting April 28, 2026, Apple will reject any app or update submitted to App Store Connect unless it is built with the iOS 26 SDK. If you have not mi…
Mobile Test Automation Frameworks in 2026: How to Choose
There are more mobile testing frameworks available in 2026 than ever before and picking the wrong one costs you months. Not in licensing fees, but in …
How to add Apple Game Center leaderboards to an Expo app
I shipped my indie game Chromatch with Apple Game Center leaderboards earlier this week. My first submit got approved with the binary alone and my 6 l…
Rescuing EXIF GPS from iPhone 17 HEIC, in a browser-only app
My wife teaches outdoor-nature classes in Taipei and drops photos into TrailPaint , a small browser-only tool I built so she could make trail maps for…
Our SwiftUI snapshot tests passed locally but failed on CI. Here's the actual fix.
500+ snapshot tests, all green on every developer's Mac, all red on GitHub Actions. Sound familiar? The common advice is "record your reference images…
Unique Identifiers in Android and iOS: ANDROID_ID, UUID, and Other Strategies
In mobile app development, it is common to need a unique identifier that consistently recognizes each device — whether for analytics, personalization,…
On-Device ML iOS: Why Apple's Foundation Models Change Everything
Over 2.8 billion iOS devices now have the computational power to run language models locally — yet most developers are still sending user data to exte…
On web rendering, layers and compositing.
How a simple task led me to encounter compatibility issues with how different browsers create layers and composite those layers while they’re being an…
React Native Exports 2,826 Symbols. Your App Needs 45.
How a missing compiler flag adds megabytes of dead code to every React Native Android app — confirmed on Mattermost, Coinbase, and Discord I've been d…