Antoine v.d. SwiftLee
@avanderlee
I teach 150K developers how to write better apps faster through my developer tool, blog, and newsletter. Join my newsletter to get started:
My Swift Concurrenct Agent Skill now supports the Agent Plugins open format. Install it in your favorite IDE, like Cursor, Claude, or like in this video: ChatGPT 🚀
Xcode 27 beta 5 is now available! If you enjoy the coding intelligence features: it now adds a new MCP server experience that runs without requiring an open Xcode workspace. Really looking forward to give this a try!
iOS Developers: it's time for a brand new developer tool! No more excuses to improve your app's performance using Xcode Instruments. Beta signups are open 🚀
Xcode Instruments intimidates, finding where to investigate is hard. I bet many iOS devs don't use it because of that. It's why I’m building RocketTrace: ranked findings, measured impact, and supporting evidence. I’m opening early beta access in small batches. Link in the first reply 🚀
A first look at what I’ve been building: RocketTrace. It turns dense Xcode Instruments traces into ranked, measured evidence, helping you focus your investigation and verify changes with a comparable run. Private TestFlight invites will go out in small batches: rockettrace.app?utm_source=x...
iOS developers: we're working on making your developer tooling even better. You know RocketSim, you'll love the other two Rocket apps we'll release later. Stay tuned ⏳
Developers using Xcode, I shipped a new Agent Skill. Who can help me test it? 🚀 github.com/AvdLee/Xcode...
Yes, this is my physical iPhone streaming Yes, you can now simulate locations on a physical device Yes, universal links and deeplinks testing has never been easier! Just connect your device via USB and enjoy RocketSim 🚀
Push it to the limit (the limit, the limit, the limit, the limit)
Using npx skills for your Agent Skills? Don't forget to use npx skills update regularly to keep your skills updated!
Yes, agents write more code for you No, you should not stop learning I'm so happy that my Concurrency Course is still being respected and used a lot! Don't forget it's you reviewing the code, you being responsible for it merging into main 💡
Building apps with agents? I'm getting closer to publishing my AI fundamentals course. Whether you use Claude, Codex, Cursor, or any other tool: my course is built around fundamentals that work for any IDE or Terminal. Join the waitlist: www.aifundamentals.dev
Do you know whether your Xcode project's build time became faster or slower this year? If you've used RocketSim's build insights, you would know!
I'm offering 1-on-1 coaching sessions to help you achieve your goals. Find out more: https://newsletter.avanderlee.com/1on1
My custom ChatGPT project knew all my app details, so I asked it to generate an app icon that went well with it. I was pretty impressed at first, until I received the app icon design from a pro designer 🙈 https://www.avanderlee.com/workflow/icon-composer-transforming-an-ai-generated-icon/
I've been developing apps since 2009, and I'm now offering free 1-on-1 career advice sessions. Find out more here: https://newsletter.avanderlee.com/1on1
Learn by shipping 🚢 Some would say it's crazy — I would say it's a must for side projects. Find out why: https://slides.going-indie.com/
A personal milestone for me in 2025 was the week of WWDC. Meeting so many great developers from the community, as well as presenting RocketSim at the Meta headquarters. What's your highlight of the year 2025? https://www.avanderlee.com/general/swiftlee-in-2025-a-full-year-as-an-indie-developer/
Embracing failure is a skill you can learn. Once you own it, success will be around the corner ✨ 6 more habits help me succeed, and I share them in my talk. Watch it for FREE at https://slides.going-indie.com
Will you join me on my journey towards 10K Monthly Recurring Revenue? I always believed in focus, but decided to build another app for this YouTube series. https://www.avanderlee.com/workflow/from-app-idea-to-10k-mrr-youtube-series/
Develop up to 2x faster with RocketSim. Research, feedback from teams, and reviews in the App Store confirm it's a no-brainer to use over 30+ features to develop apps faster 🚀 Get started today: www.rocketsim.app
Can you help me make my course pricing more accessible? Fill in this pricing research form: https://forms.gle/2QX1u6Q8gNJeewug9 Or check out this article for more info: https://www.avanderlee.com/concurrency/9-months-of-a-swift-concurrency-course/
Are you guilty? Do you have an unpublished article waiting to go live? If so, you should definitely watch my entire talk to reach a better version of yourself: https://slides.going-indie.com/
Xcode's Debug Navigator shows Energy Impact for your apps. Use it to analyze your fresh launches & background restore launches. https://www.avanderlee.com/optimization/battery-life-on-ios-and-the-myth-of-killing-apps/
Quiz question for iOS developers: what is the Swift Language Version for new Xcode Projects? Is it Swift 5 or Swift 6? Or maybe Swift 6.2? https://www.avanderlee.com/xcode/the-7-changes-i-do-for-every-new-xcode-project/
Do you recognize this pattern? File → New Project is exciting but often the wrong decision for success. Watch my talk on turning side projects into success and learn how to do better: https://slides.going-indie.com
The secret to a successful career? I can share my answer in a 1-on-1 to help you out ✨ Find out how to get started: https://newsletter.avanderlee.com/1on1