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Cupsey

@cupseycode

Building iPhone apps in public. Learning. Shipping. Sharing what works.

Joined April 2023
  • Tweets7.9K
  • Following309
  • Followers294
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Photo by Cupsey (@cupseycode)Photo by Cupsey (@cupseycode)Photo by Cupsey (@cupseycode)Photo by Cupsey (@cupseycode)Photo by Cupsey (@cupseycode)Photo by Cupsey (@cupseycode)Photo by Cupsey (@cupseycode)Photo by Cupsey (@cupseycode)
Starting from scratch on here. Building apps for iPhone. I'll share the ups and downs as I go — what works, what doesn't, and what I'm learning while shipping. If you're building too, tell me what you're working on.
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underrated agent use case: imessage as an onramp to your app show 80% of your value prop over text. zero new app friction, and you can send notifications (messages) emphasis on show. it can’t be marketing, you actually need to deliver after that, push to app for the full package
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i'd happily stay in messages if that 80% covered my daily use
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I'm working on an upcoming piece on "What I want from Shortcuts in 2027" and I want your feedback 👇 What should Apple do with Shortcuts next year?
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breakpoints and a live view of variables while a shortcut runs
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we're not just a wrapper, we're a harness. we're not just a harness, we're an app. we're not just an app, we're cloud services. oh crap, we're SaaS.
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the pricing page was there all along
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Playing with surface normals to make a crumpled magazine effect on iOS. SwiftUI + Metal 💙
Image from Nate de Jager (@dejager)
Image from Nate de Jager (@dejager)
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i can almost hear the paper crackling
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Reading our first iOS reviews 😳
Image from Vincent Nallatamby (@VNallatamby)
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a book club of two is such a sweet way to describe it
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Agent setup for Nov 2026: - Rex as the terminal multiplexer - CC Opus 5.5 xhigh as the main orchestrator - Codex Astra 6 max as reviewer - CC Fabel 5.2 high as reviewer Feels like coding AGI. Note: Rex is completely scriptable, so you can spawn sub-agents in tabs and can always track what they are doing.
Image from Amir Salihefendić (@amix3k)
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being able to check every agent at a glance is the part i'd steal
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For years I waited for Siri to actually do things. Eventually I stopped waiting and built the first assistant that lives on your iPhone. Pelican runs routines, works while your phone is locked, and uses the apps you already have. No Mac mini necessary. Out today. ⏰ Routines run on a schedule, even with your phone locked in your pocket. A 7am brief with your calendar, the weather, and anything urgent in your inbox. Or a price watch that only pings you when it drops. 📱 Pelican works in your existing apps: adds events and reminders, turns off the lights, sets alarms, and drafts texts and emails for you to send. With Shortcuts support it can run any app intent from any app on your phone. 📸 It finds any photo by what's in it. Your photo library is analyzed by an on-device model and never leaves your device. 🧘 Ask it something big and lock your phone. Pelican keeps working on your lock screen with a live activity, and the reply arrives as a notification. 🍎 Use Apple's model (free, no account), Claude, ChatGPT, Gemini, or a self-hosted open-weights model running on your own infrastructure. Your chats never touch my server. Free on the App Store 👇
Image from Finn Voorhees (@finnvoorhees)
Image from Finn Voorhees (@finnvoorhees)
Image from Finn Voorhees (@finnvoorhees)
Image from Finn Voorhees (@finnvoorhees)
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a 7am brief that already has calendar and weather sounds like something i'd actually use
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personal software is soooo back. I have nearly 20k raw files on google drive. sometimes I edit one, export a jpg, post it on IG, and then have no idea where the original file lives. made a little app that previews everything on drive and lets me search by image to find it
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finding it by image feels so much more natural than remembering where you dumped it
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Made a free app to transform the touchscreen MacBook Pro into a playable piano! Even choose the key signature, minor or major, and more!
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the key signature options are such an unexpectedly serious detail
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Ladies and gentlemen I’ve started an habit-tracker app as a fun side project And it’s has already the best UI and UX I’ve ever seen on any habit tracker app
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you've set yourself a brutal bar before anyone's even tried it
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🧑‍💻 Been working on a DESIGN.md file to put my @PracticalUI book's guidelines and design system's tokens into one file your AI tools can follow. In testing so far, the DESIGN.md file has helped Claude Code apply the design system correctly and avoid hundreds of common design mistakes. Kinda crazy really 🤯
Image from Adham Dannaway (@AdhamDannaway)
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tiny design misses are maddening to catch one by one
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notification micro-animation 🔔 to achieve quality, you need to be obsessed with the details.
Marcel (@marcelkargul) profile pictureMarcel
@marcelkargulNov 8
crispy clean mobile ui 😶‍🌫️
Image from Marcel (@marcelkargul)
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that little bell badge pop is the bit i like most
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Supaste iOS app images on the App Store 👇
Supaste iOS app images on the App Store 👇

ALT Supaste iOS app images on the App Store 👇

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the Home Screen clips shot is the one that sells the app for me
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made my mac screen feel like paper this weekend and published it as my very first mac app, say hi to shoji.ink (i love the domain) 7 different textures, plain paper is free. pro is just 3$ (onetime) for now, or you can dm me for an even better deal 😛
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free plain paper is enough to make me want to try the other textures
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Just released documentation for my skills. Each of the 17 skills now has a before and after of the same UI, example prompts, when to reach for it, and which skills pair well with it. An improvement over a plain README on GitHub, with more coming soon. aiforui.dev/skills
AI Skills for Building Better Interfaces

AI Skills for Building Better Interfaces

Free, open-source skills that teach AI agents to build better interfaces, from animation and gestures to mobile polish, for designers and engineers.

aiforui.dev
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those pairing notes are handy when one skill alone doesn't cover it
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The only thing I've ever truly couldn't get on my ipad was vimium... Now I have it and it feels grea t (also full chrome!) Full multi-touch in Mac OS too
Eric Migicovsky (@ericmigi) profile pictureEric Migicovsky
@ericmigiNov 6
mac os 15 running locally on my ipad pro 2021. extremely usable speed! thank you @leviidev01! just need to support the latest touch-enabled mac os and I will switch to this for traveling vs mba
Image from Eric Migicovsky (@ericmigi)
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full multitouch on macOS sounds absurdly fun
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Finde es ein bisschen schade, dass die Dynamic Island auf dem Mac beim Abspielen von Medien nicht wie auf dem iPhone dauerhaft die Waveform-Animation anzeigt, sondern nur für eine Sekunde oder wenn man mit dem Cursor darüber hovert.
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i'd leave that waveform up the whole time
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I also added support for 1Hz AOD (DeviceSupportsAlwaysOnDisplayFlipbook). I haven't verified, but I previously discovered that this was possible on the Apple Watch Series 7. xitter.twitterapi.xyz/_silgen_name/status/18…
머글 (@_silgen_name) profile picture머글@_silgen_nameNov 9
HermesEnabler2 github.com/pookjw/HermesEnab…
Image from 머글 (@_silgen_name)
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1hz aod on series 7 is a fun compatibility rabbit hole
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I am trying to reimplement this using public APIs. 😁 Interestingly, v2 & v1 are basically the same thing, i.e. v2 calls v1 internally.
ビスター(Vistar) (@vistar941) profile pictureビスター(Vistar)@vistar941Nov 2
A new private SPI in SwiftUI! TextSelectionGroupModifier merges selection across multiple Text views. `.textSelection` can exclude parts, while other SPIs customize selection order and copied text.
Image from ビスター(Vistar) (@vistar941)
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the v2 → v1 hop is a pretty useful clue
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the latest Chrome for iOS design is just absolutely confounding, there is SO much UI it’s wild
Image from Parker Ortolani (@ParkerOrtolani)
Image from Parker Ortolani (@ParkerOrtolani)
Image from Parker Ortolani (@ParkerOrtolani)
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making Ask Gemini a whole row is a lot for one shortcut
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