Before money moves, check with us: scam protection the family runs
This is a submission for the MLH x DEV Writing Challenge Every scam script has the same line in it: "Don't tell your family." So we built the opposi…
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Deep‑link crashes in Expo Router when the app hits real traffic
The situation You are a mobile lead on a React Native product that just shipped version 2.4 with Expo Router 2.1.0. The release added a “share‑to‑ap…
Migrating a React Native app to the new EAS build and OTA workflow without a release freeze
The situation You are the lead mobile engineer on a React Native app that ships to 150 000 active iOS and Android users. The app currently uses the…
Easy Full Stack Authentication and Login in the Style of Spring
Three requests leave your app just as its access token expires. If each refreshes independently, the first exchange can invalidate the refresh token…
I built the running coach that actually listens to your body
This is a submission for the Hacktoberfest Open-Source AI Challenge Week 2: Side Hustle What I Built I run with Nike Run Club. It tracks every run w…
Android on iOS, Web & Desktop Efficiently and for Free
We are not the first to bring Android to iOS. Earlier projects brought Android's runtime along with the application. Dalvik was built for Android, i…
CodeMate — Read and Edit Code on Your iPhone and iPad
A native code editor for developers who want to work with source files away from their desk. CodeMate helps you read, navigate, and edit source code…
Intune App Protection Policy Not Applying: A Read-First License, Targeting, and Check-In Triage
You assigned an Intune app protection policy (APP, also called MAM) for iOS/iPadOS or Android. Outlook still lets the user copy mail into a personal…
How to test an iPhone screen translator without confusing OCR failures with translation failures
Disclosure: I’m the maker of Onscreen Translate, which is referenced below. This article was prepared with AI assistance. The test plan is a propose…
Grow a Song: my run wrote its own soundtrack, with Gemma running on my phone
This is a submission for the Hacktoberfest Open-Source AI Challenge, Week 1: Touch Grass . What I Built On Friday morning I went for a 35 minute run…
HealthKit to JSONL vs JSON: one snapshot survives a cut sync, the other gives you nothing
Two apps can write the exact same Apple Health records to disk and behave nothing alike the moment a sync gets interrupted. I benchmarked it on 2026…
Native Desktop Themes for Production Apps
A desktop app needs more than larger versions of its phone controls. Dialogs need their own windows. Title bars, scrollbars, and keyboard focus need…
Your Push Request Succeeded. The Device Key Is Dead.
Your server sends a push request and gets a successful response. Somewhere in the target list is a device key that stopped working weeks ago. The re…
In iOS 27 and Xcode 27 Liquid Glass will be applied to your app automatically.
By Robin Winters · First published June 30, 2026 · Republished October 2, 2026 Original LinkedIn edition · Readable HTML edition · Robin’s portfolio…
Building an iOS Moderation Layer with Apple Foundation Models framework and Firebase
By Robin Winters · First published April 2, 2026 · Republished October 2, 2026 Original LinkedIn edition · Readable HTML edition · Robin’s portfolio…
Fitness event feeds: explicit dates, stable identity and visible conflicts
Robin Winters · October 2, 2026 · robin.ac A map can look polished while the events behind it are ambiguous. Two feeds may repeat a record, supply d…
How I Structured My First KMP App: Modules, Layers and Source Sets
A walkthrough of the modules, source sets and Gradle setup behind a Kotlin Multiplatform app on Google Play. Part 2 of “Building an Exam Prep App wi…
Marrow vs MetricBridge: free on-phone MCP or a zero-dependency local server
Marrow vs MetricBridge: free on-phone MCP, or a zero-dependency local server Two ways to let an AI read your Apple Health data without a cloud accou…
One Java Model from the App to PostgreSQL
The annoying part of full stack development is finding the same rule in three places. The app checks a field, the server checks it slightly differen…
App Review banned our core mechanic. Notarization let it through - and caught something else
In an earlier post I described how we distribute our iOS app outside the App Store through AltStore PAL. The most common follow-up question was "wha…
Goodbye pbxproj: A Friendly Guide to Xcode 27.2's New JSON Project Format
If you've built iOS apps on a team, you know this moment. You pull main , Git says CONFLICT (content): Merge conflict in project.pbxproj , and you o…
I Built SnapList to Make Product Research Less Messy
When I’m researching something I want to buy, I usually end up with the same problem: Too many tabs. Too many screenshots. Too many links. And event…
We built a video editor with automatic captions + a teleprompter because making short-form videos shouldn’t require 3 different apps
Hi, My name is Andrew. For the last 6 months, we’ve been working on Captions Bro, a video editor for iPhone and iPad built specifically around creat…
React Native Environment Setup: Managing Dev, Prod, and Staging Builds with Android Flavors and iOS Schemes
During my React Native development journey, I faced several issues managing dev and prod environments — API URLs, Firebase configuration, Android fl…
Agents Shouldn't Blink
Field notes · simframe · iOS Simulator The observation What I noticed watching Claude test my app I had asked Claude Code to check a fix on the iOS…
Six things about WKWebView the docs don't tell you
I have spent the last few months building a browser on WKWebView. Not a wrapper around a single web view — a real one, with tabs, separate cookie ja…
Sound Analysis Has No cat_hiss Label
Apple Sound Analysis can hear a meow. It cannot name a hiss Apple's built-in Sound Analysis model can label cat_meow and cat_purr . It has no cat_hi…
Lies, Damn Lies and Benchmarks
There's an old joke about three kinds of lies: lies, damn lies, and benchmarks . Codename One did very well in our benchmarks. But were they accurat…
The iOS camera lies for about a tenth of a second, and that is why nobody noticed it
Now, two weeks ago I wrote that the iOS camera track reports 1920 by 1080 while the browser draws portrait, and that you should measure the picture…
Troubleshooting .NET MAUI on macOS: From Build Errors to Device Debugging
Part 2 of 2 - Troubleshooting the development environment In Part 1 , I covered how I approached setting up a reliable .NET MAUI development environ…