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Bitrig Adds iPhone Duo Support With Interactive 3D Simulator

Bitrig has added support for building and testing iPhone Duo apps, including an interactive 3D simulator that lets developers fold, tilt, rotate and position the device.

AI News Feed · 2026-09-22 07:18

Bitrig first launched as a simple vibe-coding app that turned text or voice prompts into native SwiftUI apps running directly inside the main Bitrig app on an iPhone. Since then, the platform has expanded to include a Mac app with access to the full Xcode toolchain, an integrated iPhone simulator, on-device testing, and the ability to export projects to Xcode or distribute apps through TestFlight and the App Store. Last Friday, after Apple released Xcode 27.1 beta 1, Bitrig rolled out its own iPhone Duo support with what the report described as a more interactive take on the simulator.

Kyle Macomber, co-founder and CEO of Bitrig, said the update is meant to help developers handle the different ways the iPhone Duo can be used. He said the device can sit on a table like a laptop or stand by a bedside like a tent. It can be open, closed or partially folded, in portrait or landscape, and apps need to adapt. Bitrig's 3D simulator lets developers grab the device, fold it, turn it and watch their app respond, Macomber said.

Developers can also respond to the hinge using onHingeChange, Macomber said. He compared this to Apple's unfold effect, which makes the outer display feel like a window into the inner one. The built-in simulator allows developers to read hinge data live as they open and close the device. For hands-free experiences, Macomber said developers can use ArrangementView to lay out media on the upper half and controls on the lower half when the iPhone Duo is sitting on a table. He added that apps can support landscape orientation so people can use them on the outer display when the device is standing on its edges.

Macomber also said developers can use both displays at once. They can add a CameraCaptureAccessory to the outer display and give the person facing the camera something useful to see. In addition, he noted that Bitrig helps manage multiple versions of Xcode, so developers can start preparing their app for the iPhone Duo with the beta and switch back to Xcode 27 to build and release updates.

Bitrig directed readers to a link for more information about the latest update and how to use its iPhone Duo simulator.