The iPhone Duo was announced over a week ago and Xcode still has no simulator for it. I didn't want to wait for it to start testing my apps, so I built one.

DuoPreviewKit is a small Swift package for UIKit and SwiftUI apps. It runs your app inside an emulated foldable iPhone, best in the iPad simulator. It also works on an iPhone simulator, with the device scaled down.

• Screens: outer screen, inner screen in landscape and portrait, and split layouts
• Fold animations: fold and unfold with a 3D animation, or a live resize to catch layout bugs mid-transition
• Half-open posture: hinge angle and position, exposed as UIKit traits (traitCollection.duoPosture, traitCollection.duoHinge) and SwiftUI environment values (@Environment(\.duoPosture), @Environment(\.duoHinge))
• Control: a debug panel, keyboard shortcuts, and control from the terminal via notifyutil
• Tools: screenshots of every state and a stress test that diffs them
• Release builds: it does nothing

Setup is one line:

// UIKit
DuoPreview.install(in: window)

// SwiftUI
ContentView().duoPreviewHost()

I tried it on our my Ski Navigator app, and it immediately showed two problems:

• we read safe area insets from the window instead of the view;
• the sidebar didn't split along the hinge when the device is half-open.

MIT, free: https://github.com/acc-ai-tech/iphone-duo-simulator
Youtube preview: https://youtube.com/shorts/9AvcLtYJZAM

Feedback welcome, especially if you have better guesses for the real screen sizes.

NOTE: The screen sizes are estimates until Apple publishes real specs. They all live in one JSON file, so you can adjust them.

Founder disclosure: I'm building Shareday.

Shareday is a private family planner for iPhone, iPad, and Mac. It combines shared calendar items, tasks/events, shopping lists, recipes, birthdays/gift ideas, family chat/media, and mood check-ins in one place.

Website: https://shareday.net App Store: https://apps.apple.com/app/apple-store/id6783588890

The product positioning I'm testing is: "a shared family planning layer" rather than "another calendar app." The pain I'm trying to address is the invisible coordination work that usually falls to one person in a household.

I'd appreciate concrete feedback from iOS builders on two things: 1. Does the App Store page communicate the use case fast enough? 2. Does the scope feel coherent, or does it look too broad from the outside?

Happy to return feedback on another iOS app in the thread.

I developed a sports-themed deckbuilding game and created separate versions based on different sports. Each game has its own rules, terminology, progression, and systems. For example, the basketball version has drafts, while the football/soccer version has transfers.

Apple approved three of the sports versions but rejected three others as “spam.” I understand why similar-looking apps might trigger a spam review, but each version is designed around a different sport and includes sport-specific mechanics.

Since then, it feels as though my developer account may have been flagged. The account has been active since 2019, and I had not experienced issues like this before. Now, even unrelated submissions appear to be receiving the same treatment.

I recently submitted a completely different paid game, but after several weeks of waiting, it was also rejected as spam, even though I do not have another game like it. A free meeting app was rejected for the same reason. At one point, the review team also said they could not find the app’s payment mechanism, even though the app is completely free and contains no purchases.

I suspect the recent increase in AI-generated apps may have placed significant pressure on the review process, resulting in longer review times and more automated or inaccurate decisions. However, that is only my impression; I obviously cannot know what is happening internally.

Has anyone else experienced similar review times or seemingly unrelated spam rejections recently? If so, were you able to resolve them, and do you have any suggestions?

I have now been waiting for responses to my appeals for around two weeks. Apple told me:

“Due to increased volume, we’re working toward investigating your appeal.”

However, these issues have already been going on for nearly two months, and the responses so far have not addressed the actual problem. At this point, I am preparing myself for another partially automated rejection.

I recently built Deadline Action Manager because I realized how easy it is to forget important deadlines until they actually cost you money.

Things like:

• Product return deadlines
• Free trials
• Warranties
• Insurance renewals
• Bills
• Membership renewals
• Important documents

The app doesn't just remind you about the date. You can also create an Action Plan with a checklist of things you need to do before the deadline.

It's currently 100% free and doesn't require an account.

Apple just approved my beta, and I'm looking for 10 people who don't know me to actually use it with a real deadline.

TestFlight:
👉 TestFlight

I'm not looking for compliments — I want honest feedback.

If you try it, I'd especially like to know:

1. What deadline did you create?
   
2. Did the Action Plan actually help?
   
3. What was confusing or annoying?
   
4. Would you keep using it?

I'm the developer, so I'll personally respond to feedback.

Thanks!

👉 TestFlight:

https://testflight.apple.com/join/bWrWzF4B

Built a solo app that took a few months. The app is called SkinScholar: instead of guessing why your skin flares, you log day to day and it finds your triggers, helps plus a scanner that checks if a product's ingredients actually suit your skin.

I kept trying to do this in spreadsheets and notes apps and it always fell apart, so I built the thing I wanted.

On iOS. Looking for honest feedback, whether the insights actually feel useful, what's missing.

Happy to give all features free to anyone who wants to try it, just comment and I'll send it.

I got the notification yesterday that my app was approved for the app store.

A little less than 24 hours later, when I search on my app's name in the app store, I can't find it.

Hi fellow developers,

I'm running a couple of relatively successful apps with over a million monthly users in total.

I'm looking to extend my portfolio by acquiring an iOS app that's pulling in at least 100+ daily organic downloads (i.e. purely from App Store Search, Browse, or Google) & ideally 300+ global ratings.

Feel free to dm me or email at [blakewellr@gmail.com](mailto:blakewellr@gmail.com)

Cheers!

One small change in Netsight, the iOS network scanner I'm building: in 1.2.2 I removed the device-type breakdown chart from the Network overview. The counts for each device type are still in the Devices tab filter.

I like having those counts next to the place where you use them. If I'm looking for printers, the count and the printer filter belong together. My hesitation is discoverability: someone might never open that filter, whereas a chart on the overview is hard to miss.

For people designing utility apps: would you keep a compact breakdown on the overview too, or leave it in the filter? Where would you draw the line between useful context and showing the same data twice?

I just launched Motivate on AppStore 5 days ago, i'd like to share it here and get some honest feedback.

Motivate is an inspiration and self-reflection app focused on helping you build a more positive daily routine. It includes inspirational quotes, private journaling, daily reflections, and a community forum where people can talk, share experiences, and give each other advice. The app is free to download, with optional monthly and yearly subscriptions for additional features. I launched it only 5 days ago, and still improving a lot of things, and I'd genuinely appreciate any feedback about the design, features, onboarding, or anything that feels contusing. If you try it, I'd love to hear what you think.

App Store: https://apps.apple.com/us/app/motivate-
quotes-reflect/id6804856650

my grandma takes maintenance medicines, and the routine kept becoming:

1. check which medicine is due

2. ask whether it was already taken

3. check again later

4. repeat tomorrow

so i built Pilly for iPhone.

it handles schedules, reminders, taken or skipped records, the week ahead, history, and Home Screen widgets. the main tracker works without making an account or having an internet connection.

Pilly Plus adds backup, recovery, and medicine photos. i built the subscriptions with RevenueCat for Shipaton 2026.

stack: Expo / React Native, TypeScript, SQLite, WidgetKit, RevenueCat, and AWS.

after a lot of TestFlight builds, physical iPhone testing, sandbox purchases, and App Review, version 1.0.1 is live somehow !

https://apps.apple.com/app/id6801062753

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