It’s Black Friday week, and that means it’s the best time to become a concurrency expert, go independent, or increase app development productivity with RocketSim.
My three core products are available at a reduced price and this week’s article will tell you how to get it.
How to get the discounts
If you’re already familiar with RocketSim, Going Indie, or my Swift Concurrency Course, I bet you just want to know how to get the discounts. It’s simple, just sign up here.
Swift Concurrency Course: Transition to Swift 6.2
If you’re ready to level up your Xcode projects to Swift 6.2 and benefit from compile-time thread-safety, this course is for you. I’ve added new lessons last week and it’s now offering:
- 73+ Lessons
- 11 assessments
- An official certificate of completion (Great for your LinkedIn!)
Trusted by leading tech companies like Garmin, Soundcloud, and Airbnb, and many testimonials can be found on swiftconcurrencycourse.com.
The course covers Swift Concurrency in easy-to-digest lessons. My philosophy is that you don’t always have hours of free time to study new technology. That’s why you’ll find lessons that you can complete in 30 minutes, so you’ll gracefully adopt all the latest changes. Each lesson is written like any SwiftLee article you’re used to: I make complex topics easy to understand.
Get the Concurrency course with a 50% discount
Is this a lifetime purchase?
Yes, you’ll get all future lessons for free.
Is this course up to date with the latest changes announced at WWDC 2025?
Yes, I’ve updated all lessons for Swift 6.2.
What if some lessons aren’t clear or features are missing?
I’m actively keeping the course up to date and I’ve already implemented several lessons based on direct feedback from students.
How official is that certificate?
Each certificate has a unique number, and I offer official validation if you’re applying for a job and the company wants to verify your knowledge. Many students have already been adding their certificates to LinkedIn, as it can powerfully demonstrate their Swift knowledge and help them get hired.
Do you offer videos in the course?
While I do for some lessons, I strongly believe in the power of learning via text + images. Complex topics like concurrency are easier to digest if you can read them at your own pace. You can quickly reference lessons if needed and visuals will still provide powerful insights if needed.
Can I buy the course for my whole team?
Yes, you can. Commercial pricing applies, but a group discount is possible. Simply reach out to [email protected].
FREE 5-Day Email Course: The Swift Concurrency Playbook
A FREE 5-day email course revealing the 5 biggest mistakes iOS developers make with with async/await that lead to App Store rejections And migration projects taking months instead of days (even if you've been writing Swift for years)
RocketSim: 30+ Utilities for Xcode’s Simulator
A Mac developer tool that offers 30+ new features for Xcode’s Simulator. It’s used every year by 80,000+ developers and 200+ teams. Benefits include:
- Monitor and inspect your app’s network requests
Inspect URLSession requests — JSON Responses, request headers, etc. - Controlling the Network Speed of your app
Slow down just your Simulator app, while your Mac’s connectivity remains fast. You can even block requests completely to test your app when there’s no network connection available - Monitor and edit your app’s User Defaults
Quickly enable a feature flag or monitor whether your app properly updates the user defaults.
And those are just 3 out of the 30+ features RocketSim offers. Last week, we’ve released:
- Single-click recordings with real device bezels (example here)
- Push notification permissions resetting
Reset the state of push notification authorization, so you can retest the flow as if it’s a clean install
For a complete overview of all the features, check out www.rocketsim.app.
Get RocketSim with a 50% discount
Is this a lifetime one-time purchase?
No, it’s a discount on 1 year of RocketSim Pro.
How often are you updating the app?
Too often, ha! I’m actively working on this app. It’s my full-time job, so you can expect many more features to come.
Why do I need this app, can’t I just use Xcode’s default Simulator and tools?
Of course, you can! But many of the features RocketSim offers aren’t possible in the standard Simulator. I did a research in 2024 among existing RocketSim users and they reported being twice as fast due to RocketSim. We’re now 1,5 years further, so there are even more features that boost your productivity.
I have a camera focused app, so I always build on a physical device. Is the app still worth trying?
Good news: RocketSim now supports camera testing in the Simulator. Say goodbye to always developing on a device!
Do you offer team licenses?
Yes, but Black Friday does not apply to these. We do offer group discounts. Team licenses have even more features focused on teams. Contact us via [email protected].
Don’t wait too long!
These discounts are only available from November 24th to November 30th.
Thanks for your continuous support
As an indie developer, your purchases and your support mean a lot. It allows me to continuously publish free resources, such as SwiftLee’s weekly article and the many YouTube videos I’ve posted lately.
Enjoy these discounts!