
Antoine v.d. SwiftLee
@twannl • 72,046 subscribers
I teach 150K developers how to write better apps faster through my developer tool, blog, and newsletter. Join my free course to get started 👇🏻
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Stop killing your apps — you’re not saving battery, you’re draining it. 🪫
Antoine v.d. SwiftLee 1,894,013 views • 5 months ago

Not one, but six new Agent Skills! Early adopters improved Xcode build times by 78%. After weeks of work, I launched my latest Agent Skill at Let’s Vision in Shanghai. Here’s how it works: It runs 3 clean + 3 incremental builds It analyzes build logs and project settings It proposes an optimization plan It applies improvements after you approve It re-benchmarks and reports the improvement All free → try it on your Xcode projects. Let me know how it goes in the replies, and open a PR if you add your results to the README!
Antoine v.d. SwiftLee 125,044 views • 2 months ago

Stop letting your AI agent guess what’s inside the iOS Simulator. I built RocketSim’s CLI + Agent Skill so agents can inspect screens, tap, type, recover from state changes, and even validate accessibility support with far fewer tokens. Benchmarked against a popular alternative: 19% faster, 63% fewer estimated tokens, 0 wrong taps. Demo below 👇
Antoine v.d. SwiftLee 28,700 views • 24 days ago

Spent the week building an iOS Simulator CLI tuned for AI agents bundled in RocketSim - Build Apps Faster Head-to-head vs. popular open-source alternatives across 5 real Settings app flows: 📉 ~12x fewer tokens ⚡️ 1.6x faster ✅ 4x fewer wrong taps Token cost is the killer for any agent paying per call. What's the one Simulator flow you'd want this CLI to handle?
Antoine v.d. SwiftLee 29,723 views • 1 month ago

This free Mac app helps me solve crashes instantly. No more guessing, I'm only focused on writing a fix. Do you recognize those moments when you've received a crash report from a user? Or maybe you're debugging on a physical device from a colleague? I'm generally using Sentry for optimizing stability and fixing issues, but for the above cases, this is a great addition. Find the link below in the replies!
Antoine v.d. SwiftLee 22,699 views • 7 months ago

The 3 phases of refactoring a SwiftUI View to improve readability and reusability. 1️⃣ Extract Dedicated SwiftUI Views 2️⃣ Create Reusable View Modifiers 3️⃣ Build Generic View Extensions Applying these together makes your views easier to scan, read, and reuse. Your code becomes cleaner, faster, and future-proof. Scalability starts today. The fundamentals were built yesterday. (Short video below 🎥) #swiftdevelopment #iosdevelopment #swiftui #swiftlanguage
Antoine v.d. SwiftLee 16,700 views • 7 months ago

🚀 BIG NEWS: I'm Going Indie & Launching My First Course! 🤩 After 7.5 amazing years WeTransfer, I'm leaving a truly special company and team. It's bittersweet, but going fully independent is a dream come true. Read my full story: 🌟 New Course: From Side Project to Going Indie 🌟 Are you ready to make your side project a success? Want to quit the 9-to-5 routine and endless meeting days to go independent? Perfect! This course is for you: #IndieDev
Antoine v.d. SwiftLee 35,637 views • 1 year ago
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