Relay is a GTD app that stays faithful to David Allen's Getting Things Done method. The lists, horizons and reviews are already set up, so you can start engaging on day one instead of building a system first.
Everything goes to the Inbox first: typed in, shared from another app, added from a widget, forwarded by email, or captured with a keyboard shortcut on Windows and Mac. A clarify wizard then, one item at a time, asks the GTD questions until it becomes a next action, a project, a waiting for, someday/maybe or reference.
The weekly review is a step-by-step flow with trigger lists, plus a short daily review. Projects link up to areas, goals, vision and purpose. Engage filters next actions by context, energy and the time before your next meeting.
Optional connections to Google and Outlook calendars, Google Tasks, Microsoft To Do, Todoist, Notion and Linear. Runs on iPhone, iPad, Mac, Android, Windows and the web. Hosted in Switzerland. Has a 30-day free trial.