Xcode
Apple's IDE for its platforms: the editor, the simulator, Instruments and the tools to sign and upload an app.
Visit developer.apple.comiOS builds, signing and Instruments.
- What it is
- IDE
- On my tools page
- Mobile
- Updated
- November 2026
Where I write about Xcode
Articles on this site that mention it.
Nov 4, 2026 · Engineering
Hermes Has No JIT: Why Your React Native App Scrolls but Taps Hang
My phone app scrolled fine but ignored taps for seconds. A layout that took 192 ms in Node took 8.3 s without a JIT. How to measure phone JS honestly.
Oct 2, 2026 · Engineering
Six Crashes Importing Apple Health: What HealthKit Doesn't Tell You
My Apple Health import crashed six times. It was never memory: one unit label killed the process with no JS error. What I learned about HealthKit reads.
May 20, 2026 · AI
AI Code Review: Give It the Files, Not Just the Diff
An AI reviewer that only sees the diff reviews syntax. Give it the files, the spec and the tests, and it starts reviewing like a senior.
Feb 16, 2026 · Android Development
You Don’t Need a Team of 10 Devs Anymore. You Need A System.
Most early-stage tech startups make the same costly mistake:
Nov 19, 2025 · Android Development
The 6 Steps I Follow to Build Any Mobile App in 2025
I’ve built dozens of mobile apps in the past 10+ years — from solo MVPs to full-scale production apps for funded startups and enterprise clients.