OmniFocus is a personal task manager by the Omni Group for macOS and iOS.

[4] The program uses concepts and techniques described in the book and productivity system called Getting Things Done (GTD) by David Allen.

The Omni Group subsequently brought Ethan along with Merlin Mann to form a project team to create the OmniFocus application.

OmniFocus is available on iOS (including the iPod Touch, iPhone, Apple Watch and iPad), and VisionPro.

Google Play lists various third-party applications that interface with OmniFocus through the Omni Sync Server (e.g., Focus GTD).