Cognition says its Devin agent can now build and test apps for the folding iPhone Duo in macOS cloud machines, with video proof
Devin can now build and test iPhone Duo apps in macOS cloud VMs Unfold the phone, fold it, close it, check every screen, and get video verification of everything. Here are some examples: 1. Devin takes someone's portrait while they watch themselves on the outside screen, it sends posing cues, half-folds the phone so it stands on a table, takes timer shots, and closes the phone mid-countdown to make sure no photo gets lost
Context
Testing apps on folding phones is slow by hand, and an agent that checks every screen and hinge position could speed up work for a new kind of iPhone.
This is a first hand post from Nader Dabit, who works at Cognition, the company behind Devin. The capabilities shown are the company's own demos.
Deep dive
On October 16, Nader Dabit posted that Devin can now build and test iPhone Duo apps in macOS cloud virtual machines. He wrote that it can unfold the phone, fold it, close it, check every screen and give video verification of everything.
In his first example, Devin takes someone's portrait while they watch themselves on the outside screen. It sends posing cues, half folds the phone so it stands on a table, takes timer shots, and closes the phone in the middle of a countdown to make sure no photo gets lost.
The attached video shows a test report named Pose Mirror in depth, listing five passed checks and none failed. The checks include timer shots with countdowns on both views and tracking the camera aim across several hinge angles.
The iPhone Duo is a folding iPhone with an outside screen, which gives developers more screen states and positions to test than a regular phone. Devin, made by Cognition, is an AI agent that writes and tests software in its own cloud computer.
The post does not say whether this runs on real devices or only in Apple's simulator, or what it costs.
What to expect next
Watch whether app makers use Devin to prepare apps for the iPhone Duo, and whether Apple's own developer tools add similar automated testing for folding screens.
Also watch whether rival coding agents such as Claude Code, Codex or Cursor add macOS cloud machines and mobile testing, and whether Cognition publishes pricing for these runs. Results on real hardware would show how well simulated tests hold up.