6 Oct 2026 · 51 minNew
211: “It’s not analytics, it’s telemetry”
John and Rambo discuss various ways of implementing logging, telemetry, and analytics within a project, and how to decide when and how to bring in a third party dependency.
Podcast · Tech & Science
Stacktrace
by John Sundell and Gui Rambo · English · Tech & Science
A podcast about life and technology from two developers’ perspectives. With John Sundell and Gui Rambo.
- New episodes
- Monthly
- Typical length
- 1 hr 10 min
- Latest
- 6 Oct 2026
- Language
- English
Latest episode
Earlier episodes 29 most recent
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25 Aug 2026 · 1 hr 13 min
210: ”Just bytes in a pipe”
John and Rambo revisit the topic of closures and how their use has evolved since Objective-C’s blocks, and then go on a behind-the-scenes deep dive into AirBuddy 3.
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31 Jul 2026 · 48 min
209: “False positives or positive negatives”
John and Rambo discuss the pros and cons of using AI assistants and agents in the context of open source, as well as how unit testing has evolved on Apple’s platforms during the last few years, with the introduction of tools such as Swift Testing.
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22 Jun 2026 · 1 hr 7 min
208: “You are the compiler”
John and Rambo discuss some of the new APIs and technologies introduced at WWDC26, including new Swift features, and changes to frameworks like AppKit and FoundationModels. Also, the state of Swift 6, and WWDC video watching strategies.
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13 May 2026 · 1 hr 10 min
207: “It’s not magic, it’s all in the kernel”
John builds a cross-platform UI framework in Rust, and Rambo uses the macOS virtualization system to create a virtual iPhone.
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8 Apr 2026 · 53 min
206: “Let’s deprecate Xcode projects”
Using Android as an iOS user, and the state of Swift Package Manager, including how it could become a more full-featured orchestration tool for Xcode projects.
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11 Mar 2026 · 1 hr 6 min
205: “The 2026 edition”
On this first episode of the 2026 season, John and Rambo discuss how they’re using AI agents when working on different projects, and how to approach learning new programming languages in 2026.
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14 May 2024 · 1 hr 3 min
204: “Ship a prompt”
Stacktrace is back! John and Rambo check their hype levels for WWDC24, and discuss how AI might fit into Apple’s plans for this year’s releases. Also, Xcode wishes, and the challenges of building distributed systems.
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18 Dec 2023 · 1 hr 16 min
203: “The Sherlock Holmes of debugging”
John and Rambo reflect on what they’ve been learning and how they’ve been aiming to improve as developers during 2023. Also, tips for getting better at debugging, deploying generative AI within existing apps, and are view models really such a good fit for SwiftUI views?
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6 Nov 2023 · 1 hr 4 min
202: “Incrementing the integer”
Reactions to Apple’s “Scary fast” event, Rambo’s review of the iPhone 15 Pro Max, and under the hood of CleanupBuddy.
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7 Sep 2023 · 1 hr 6 min
201: “USB-C utopia”
Will this year’s iPhones switch to USB-C instead of Lightning, what could an Apple Watch Ultra-style action button be used for on a phone, and will Apple give us another look at the Vision Pro at their upcoming “Wanderlust” event?
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31 Jul 2023 · 1 hr 10 min
200: “Expectation recalibration”
Rambo’s custom implementation of macOS desktop widgets and how they relate to Apple’s new built-in system feature, why the experience of using SwiftUI depends so much on the environment it’s being used in, and a mini-review of the ASUS ROG Ally.
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22 Jun 2023 · 1 hr 18 min
199: “Taking the cover off the API”
John and Rambo start diving into the new announcements from WWDC23 — including the Apple Vision Pro and visionOS, the new Apple Silicon-powered Mac Pro, as well as many of the updates to Apple’s various operating systems.
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1 Jun 2023 · 1 hr 23 min
198: “WWDC23 Keynote Poker”
With the start of WWDC23 just around the corner, John and Rambo share their predictions, hopes, and dreams as to what Apple might introduce during this year’s edition of the conference. It’s Keynote Poker time!
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12 May 2023 · 39 min
197: “Perceived fluidity”
Reducing UI flickering, designing in-app purchase and signup flows, and how adding delays can interestingly make a UI feel more smooth and stable.
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24 Apr 2023 · 1 hr 16 min
196: “That new Mac smell”
Integrating AI-powered features into an iOS app, using high refresh rate monitors with a Mac, the advantages of simple abstractions, and how the M1 and M2 Max compare in terms of Xcode work.
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13 Mar 2023 · 1 hr 25 min
195: “The Swift historian”
John and Rambo celebrate the 5-year anniversary of the show by looking back at how their work and the technology they use have changed since the beginning of the show. Also, how might things change during the next 5 years, specifically when it comes to machine learning, AR, and the openness of Apple’s platforms?
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16 Feb 2023 · 1 hr 19 min
194: “Definitely not called a puppy”
How game controllers communicate with a Mac, handling asynchronous data and actions in SwiftUI, and various ways to use view models within a code base.
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12 Jan 2023 · 1 hr 15 min
193: “Build your own Mac”
Thoughts on the most recent Mac Pro rumors, building custom layouts for SwiftUI views in a backward-compatible manner, and the mechanics of making a UI interaction feel responsive and fluid.
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21 Dec 2022 · 1 hr 22 min
192: “Sundell Silicon”
Building computers, running A/B tests as an indie developer, using UIKit as a layout tool for SwiftUI views, and deciding whether to use Core Data or a more simple on-disk data storage solution.
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24 Nov 2022 · 53 min
191: “Back to the future”
Building custom collection view layouts, introducing new features into a legacy code base, and managing patch releases while also working on a major new version of an app at the same time.
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2 Oct 2022 · 1 hr 9 min
190: “Actual trips to the Dynamic Island“
John’s got the new AirPods Pro, Rambo’s got the iPhone 14 Pro, so the two share their initial impressions of using these new devices and how features like Dynamic Island and Adaptive Transparency work in day-to-day use.
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15 Sep 2022 · 1 hr 1 min
189: “The UI equivalent of a singleton”
John and Rambo discuss three of the key announcements that Apple made during their “Far Out” event — the Apple Watch Ultra, the new AirPods Pro, and the iPhone 14 Pro.
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31 Aug 2022 · 43 min
188: “The least risky of the risky ones”
With Apple’s upcoming “Far Out” event just around the corner, John and Rambo share their predictions as to what new devices, services and features that might be announced. It’s Apple Keynote Poker time!
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12 Aug 2022 · 1 hr 2 min
187: “An endless supply of SwiftUI thoughts”
John gains a new “job title”, Rambo starts working on an iOS version of AirBuddy, and the two discuss how come the Apple developer community tends to be so focused on UI frameworks.
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14 Jul 2022 · 1 hr 29 min
186: “A relational database using Markdown”
John and Rambo share their initial impressions of some of the new APIs that were announced at WWDC22, and talk about managing releases, learning when and how to apply generics, and the launch of the Gigahertz podcast network.
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16 Jun 2022 · 1 hr 37 min
185: “A big ‘finally’ moment”, the WWDC22 keynote review
John and Rambo discuss Apple’s WWDC22 keynote, and share their first impressions of the new features and APIs that were announced.
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1 Jun 2022 · 1 hr 29 min
184: “State of anticipation”
It’s time for John and Rambo to play another round of Apple Keynote Poker! This time the two place their bets as to what Apple might introduce during the WWDC22 keynote and State of the Union session.
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25 May 2022 · 1 hr 16 min
183: “Let’s just call it MVC”
Organizing workspaces and hobby projects, the pros and cons of view models and controllers, and rendering Core Animation layers within SwiftUI view hierarchies.
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13 May 2022 · 1 hr 8 min
182: “Are you ready to enter a rabbit hole?”
A deep dive into how WidgetKit and SwiftUI’s serialization mechanism works under the hood, why John removed the ads from the Swift by Sundell website, and the discontinuation of the last iPod model.
About Stacktrace
A podcast about life and technology from two developers’ perspectives. With John Sundell and Gui Rambo.
Stacktrace is a English tech & science podcast from John Sundell and Gui Rambo. Melo plays each episode straight from the publisher's own feed — no ads added, no account needed — and remembers where you stopped, in this browser only.
- Publisher
- John Sundell and Gui Rambo
- Language
- English
- Category
- Tech & Science
- New episodes
- Monthly
- Typical length
- 1 hr 10 min
- Latest episode
- 6 Oct 2026
- Feed
- RSS — paste into any podcast app
- Apple Podcasts
- podcasts.apple.com/podcast/id1359435443
- Rights
- John Sundell and Gui Rambo 2018-2022
More English tech & science 6
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