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Give your simulator superpowers

RocketSim: An Essential Developer Tool
as recommended by Apple

Issue 345
Oct 13, 2026

This week's SwiftLee Weekly covers:

  • How to clean-up Xcode-mess with worktrees
  • Using Xcode 27's localization skills outside of Xcode
  • Post-launch marketing for apps

Enjoy this week's SwiftLee Weekly!

THIS WEEK'S BLOG POST

​Agentic iOS Development with RocketSim and RocketTrace​

Practical advise this week based on 4 workflows that I regularly use, combined with the tools that fit the prompts I share. If you're into agentic development, you'll probably have some takeways here.
​avanderlee.com​

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CURATED FROM THE COMMUNITY

​Devs for Devs: What I Learned Building and Shipping My First Two iOS Apps​

A great way to grow is by learning from another one's experience. A thing that resonates a lot with me: building an app yourself teaches you things a course can't. Practical experience makes a difference.
​thosewhoswift.substack.com​

​Where did my disk go? Xcode, worktrees and AI agents​

I have a lot of disk space, but I'm still hitting it super easily with all the agents I control. This article by Karolina Samorek couldn't be better timed, and will likely help some of you sooner or later.
​skarol.dev​

​Supporting Differentiate Without Color in SwiftUI​

Differentiate without Color is an important part of your app's accessibility support. Natascha Fadeeva explains what it is, and how you can add support for it in your apps. Combining it with Accessibility Audits done by your agent makes it a perfect match.
​tanaschita.com​

​Using Xcode 27’s localization skills over MCP​

What if you want to use Xcode 27's localization skills outside of Xcode? This article by Max Seelemann might come in handy.
​macguru.dev​

​When toolbar items share a glass background in iOS 26​

I'll be honest, I did notice toolbars sharing a glass background, but I did not know when and why. This article by Sarunwhelped me understand this further. Never stop learning, I guess!
​sarunw.com​

WHAT I'M WORKING ON

Post-launch marketing of apps

With agents writing more of our code, meta skills become more important. How to market your app? Will paid acquisition be something worth exploring?

I'm personally great at building and shipping apps, and yes, I've also built an audience. But I also must be honest: I could do so much better at marketing.

I'm currently running Apple Search Ads for the first time, also because I never had a high-potential iOS app before. Marketing for developer tools was mostly easy, as I already run this newsletter and blog.

One thing that does stand out to me is working together with fellow indie creators. It's like working together with influencers in the scene of your app. Last week, I joined Florian Schweizer (Flo writes Code) to launch a video together about RocketTrace. It's a great video to watch for you as a developer, as it explains why it's important to use Xcode Instruments and what details matter:

video preview​

To me, it's an example of marketing collaboration. Your audience compounds with the other's. Florian benefits from my reach, I benefit from his. This also works for other nieces. Maybe you can promote a music artist in your app, while they promote your app on Instagram in return?

Anyone can build, AI can do marketing but it's sloppy. If you manage to get reach, you'll be way more successful.

{% assign referral_count = subscriber.rh_totref | default: 0 | plus: 0 %}{% if subscriber.rh_reflink != blank %}UNTIL NEXT TIME

{% if referral_count >= 30 %}You’re one of SwiftLee Weekly’s top advocates

You’ve referred {{ referral_count }} developers and reached every current reward. Thank you for helping SwiftLee Weekly grow.

{% elsif referral_count >= 10 %}You’ve unlocked Swift Concurrency Course access

You’ve unlocked Swift Concurrency Course access as you’ve referred {{ referral_count }} developers.

{% assign referrals_needed = 30 | minus: referral_count %}Refer {{ referrals_needed }} more to unlock RocketSim Pro Lifetime.

{% elsif referral_count >= 3 %}You’ve reached your first referral reward

You’ve referred {{ referral_count }} developers. {% assign referrals_needed = 10 | minus: referral_count %}Refer {{ referrals_needed }} more to unlock Swift Concurrency Course access.

{% elsif referral_count == 2 %}One more referral unlocks your first reward

You’ve referred two developers. One more unlocks 50% off RocketSim Pro Yearly.

{% elsif referral_count == 1 %}You unlocked my 5 agent workflows

I’ve sent the reward to your inbox. You’re now two referrals away from 50% off RocketSim Pro Yearly.

{% else %}Refer one developer. Get my 5 agent workflows

Know a Swift or iOS developer who would enjoy SwiftLee Weekly? Refer one confirmed subscriber, and I’ll send you the five agent-powered workflows I use for marketing, App Store metadata, support, performance, and Xcode disk cleanup.

Your rewards continue from there: reach three referrals to unlock 50% off RocketSim Pro Yearly.{% endif %}

Your personal referral link

​{{subscriber.rh_reflink}}​

Share by email · WhatsApp · LinkedIn · X/Twitter · Bluesky​

{% if referral_count < 30 %}Rewards:

  • 3 referrals unlock 50% off RocketSim Pro Yearly
  • 10 unlock Swift Concurrency Course access
  • 30 unlock RocketSim Pro Lifetime.{% endif %}

​See your rewards and progress →​

{% endif %}Thank you so much for your support, and until next Tuesday,

Antoine

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