Julio Carrettoni retweeted
🚨 Going out of business sale 🚨
iOS dev course sales plummeted due to AI. It costs a lot of money to host my courses online and with sales at basically $0, I've cancelled that hosting.
This closes down the site which unfortunately removes access to the courses.
I want you to have the courses you purchased forever, so I've added the ability to download my course videos so they are yours.
I've put my recent course on sale at a large discount so you can get it before it's gone and I've made old courses available for free if you want to grab those too.
The school will be online until November 24th so you have a few weeks to download these videos at seanallen.teachable.com
Thanks for learning with me and supporting my work over the years. I appreciate it.
Julio Carrettoni retweeted
Apple can now delete your whole developer account for a feature hidden in your binary. On Friday it became a separate rule, 2.5.19.
Apple already rejected one of my apps for this. I'd left three testing switches in the release build: screenshots-mode, slow-entitlement, UnlockedMockPurchases. Nobody could reach them from the App Store, but Apple wrote that they "appear to have been intentionally hidden".
Now I run strings on every archive before I upload.
ALT App Store Connect message from Apple on 2026-09-08 about Snowball Debt Payoff Planner: Guideline 5.6, Developer Code of Conduct. Issue description: We've identified a pattern of unusual behavior with the app that is commonly associated with fraudulent activity. Specifically, the app contains features that appear to have been intentionally hidden during the review process. Manipulative and misleading behavior is not consistent with the guideline 5.6.
Julio Carrettoni retweeted
If we only use AI to make the things that we already make, just faster, then we're definitely missing out on the most interesting part.
From my talk at @lennysan’s Summit, here are four ideas for raising the ceiling, not just the floor:
- Have a point of view [5:38]
- Encode your standards into the machine [9:07]
- Don't confuse done with good [12:21]
- Unleash creativity and artistry [16:19]
Full talk here: youtu.be/GLvFTMtw4Jk?si=-5Ts…
Julio Carrettoni retweeted
Developers:
Send us your iPhone Duo apps and updates! 😍
📧 [email protected]
iPhone Duo App Submissions Are Open macstories.net/linked/iphone…
Julio Carrettoni retweeted
Plankle No. 006 5/5
🟨🟨🟨🟨🟫
🟨🟩🟨🟨🟨
🟨🟩🟨🟨🟫
🟩🟩🟨🟫🟨
🟩🟩🟩🟩🟩
Five machines, one plank. Can you work out today's line? plankle.com/
Julio Carrettoni retweeted
Xcode 27.1 beta ships with a skill to help you getting your app ready for iPhone Duo. You should check it out!
Julio Carrettoni retweeted
Estuve jugando con Jev, aca les dejo algo de datita.
1. El problema
Tenemos unos scrappers de autopartes que levantan miles de items diarios y muchas veces es muy dificil decidir si dos items de distintos proveedores son el mismo o no. Cada uno con su SKU y su texto (y abreviaturas, ej: P.T.D puerta trasera derecha).
2. Un ejemplo puntual
Proveedor 1: Hyundai Veracruz ´09 - P.T.D.
Proveedor 2: HYUNDAI Veracruz '09/'12 - P.T.D.
Misma puerta trasera derecha. Abreviaturas distintas, misma pieza.
3. Solucion?
La idea era simple, tomar un LLM, darle un propmt y un json estructurado de output esperado y evaluar la calidad de la respuesta.
Probamos con Gemini 3.8 Flash vs Jev 1.13
4. Costos y tiempo (35k items)
Gemini 3.8 Flash: ~US$ 23 · ~4 pares/s · horas (techo ~300 RPM)
Jev 1.13: ~US$ 1,50 · ~150 pares/s · 4 min
5. Output obtenido
89% coincidieron (31.728)
Donde no coincidieron lo mandamos a que lo revise un humano (3.866 casos)
Les dejo un caso donde no coincidieron:
Optica Prisma F1 11/13 Fondo negro IZQ
OPTICA PRISMA 11/13 FASE I fondo cromado oscuro IZQ
Gemini dice "Si", Jev dice "unsure"
Gemini: misma óptica F1. Jev: negro vs cromado oscuro, no mergea.
Julio Carrettoni retweeted
If your app has been using AsyncImage before, chances are, you didn’t mind a little reload. On iOS 27, those instances automatically get cached.
If you serve the images, you can control the cache policy via backend changes alone. AsyncImage follows web standards for caching.
iOS 27 gives AsyncImage more control over remote image loading with URLRequest support for custom headers, cache policies, and timeouts, plus the ability to provide a custom URLSession across a SwiftUI view hierarchy: nilcoalescing.com/blog/Async…
Julio Carrettoni retweeted
This post and the ones that follow from @kylemacomber, @jacobx, and @tdonnelly are so worth reading to understand the principled technical decisions behind SwiftUI’s animation system.
Fun fact: the creator of CoreAnimation is one of the creators of SwiftUI!
The decision to run animations in the app process rather than the render server (as CoreAnimation does) was one of the earliest and most fundamental decisions we made when designing SwiftUI.
Some of the most distinctive experiences of using an iPhone, like UIScrollView rubber banding and SpringBoard app switching are only possible as client-side animations.
But these experiences aren’t easy to build with UIKit!
This is because if you want a UI to be fully interactive and interruptible by the user while it’s animating, it has to be running in the same process as the event handling.
In fact, in iOS 18 we added new APIs to AppKit and UIKit to adopt the SwiftUI client-side animation model.
There are a lot of valid critiques of SwiftUI. The fact that SwiftUI doesn’t use CoreAnimation for its animations is not one of them.
Julio Carrettoni retweeted
Plankle No. 002 4/5
🟨🟩🟫🟨🟨
🟫🟩🟩🟨🟨
🟩🟩🟩🟩🟫
🟩🟩🟩🟩🟩
Five machines, one plank. Can you work out today's line? plankle.com/
Julio Carrettoni retweeted
trained a fly connectome to handle kubernetes deployments
imagine escaping your mortal body only to find out you're now primary oncall
For the first time, scientists have mapped the complete brain and central nervous system of an adult male fruit fly — a key model organism in science. 🪰
Working alongside HHMI Janelia Research Campus and the scientific community, @GoogleResearch scientists and researchers used AI to combine millions of 2D images into 3D neural shapes, reconstructing a record-breaking 166,000+ neurons. This foundational map of the adult male fruit fly brain can help accelerate our understanding of the brain, and is a major milestone in neuroscience.
ALT Vibrant 3D digital reconstruction of a fruit fly brain against a white background, displaying a dense, intricate network of multicolored neural fibers and cell bodies in shades of blue, cyan, orange, and purple.
ALT A complex 3D visualization of a fruit fly brain, featuring a dense, symmetrical network of thousands of tiny, multicolored neurons and fine, interconnected fibers in shades of blue, magenta, orange, and green against a solid white background.
Julio Carrettoni retweeted
Pro-tip. Just add “.md” to any HIG link to get the md file so it’s more digestible for your bb ai’s bedtime 🍼
developer.apple.com/tutorial…
Designing for iPhone Duo is live on the HIG. Read it to your ai as a bedtime story 🪩
developer.apple.com/design/h…
Julio Carrettoni retweeted
Trust me, no one was more interested in open-sourcing SwiftUI than many of the people working on SwiftUI!
Because selfishly, it would then be a lot more clear to everyone how much of it is *not* a thin wrapper around UIKit and AppKit. It’s a full stack UI framework on its own, which is also why large parts of UIKit and AppKit are now able to be rebuilt on top of it (as recently mentioned by Apple in this year’s SOTU).
Until you've walked a mile in their shoes, it can be hard to appreciate why the teams at Apple are so conservative with the API surface they expose.
But look at the navigation bar in iOS 17. Now look at it on iPhone Duo on iOS 27. It was a massive multi-year effort that required rewriting nearly all of UINavigationBar and UINavigationController.
Do I wish SwiftUI was open source? Yes. But the folks on the UI framework team have good reason for operating the way they do.
Julio Carrettoni retweeted
end of an era. apps not using UIScene lifecycle crash on launch when build with iOS 27 SDK
Application failed to launch: UIScene life cycle is required for apps built with this SDK.
Julio Carrettoni retweeted
Tell your agents that if you append `.md` to any of Apple's developer documentation it will render as markdown.
developer.apple.com/document…
Julio Carrettoni retweeted
Designing for iPhone Duo is live on the HIG. Read it to your ai as a bedtime story 🪩
developer.apple.com/design/h…
Julio Carrettoni retweeted
Hi ravenous designers. Here are the iPhone Duo bezels, design kits coming up soon.
developer.apple.com/design/r…
Julio Carrettoni retweeted
We have some new APIs to support iPhone Duo. Here some amazing talks covering everything you need to build great experiences on this gorgeous new device:
developer.apple.com/videos/p…
developer.apple.com/videos/p…
developer.apple.com/videos/p…
developer.apple.com/videos/p…
developer.apple.com/videos/p…
