New app turns iPhone into trackpad

A new application called Duo Trackpad, developed by Matt Corey, allows users to control a Mac's cursor using the screen of an iPhone or iPad, including the iPhone Duo. This innovation turns a mobile device into a trackpad-like interface, offering a larger and more ergonomic surface than standard iOS devices.

Developer's motivation

Corey created the app to meet a practical need for mobile work, aiming to reduce the weight of his travel bag while still maintaining ergonomic control over his MacBook. The app is designed to help users who want to work efficiently on the go without carrying additional hardware.

Supported features

The app supports essential macOS multi-touch gestures, including scrolling, drag-and-drop, pinch to zoom, switching between virtual desktops, and accessing App Exposé. These features allow users to perform many of the same actions they would with a physical trackpad.

Customization options

Users can also customize the touch surface with shortcuts and quick actions, tailoring the interface to their specific workflow. This flexibility makes the app useful for a variety of tasks, from everyday computing to more specialized work.

Compatibility and setup

While the app is optimized for the iPhone Duo, it also works on standard iPhones and iPads. The setup requires installing the app on the mobile device and a companion utility on the Mac, both linked through the same iCloud account. This ensures seamless integration between devices.

System requirements and cost

The app requires devices running at least iOS 26, iPadOS 26, and macOS 26. However, the app operates on a subscription model, which may affect its long-term cost-effectiveness compared to purchasing a physical Magic Trackpad.