As detailed in a post on the Cultured Code's blog, Things for Apple Watch was created to guide people through their daily "Get Things Done" goals, much like Apple's own built-in fitness-based apps help guide people through their daily movement goals.
Things for Apple Watch revolves around a "Today list" that serves as a central place for people to list all of the goals they want to accomplish in any given day. Tasks can be pulled from different to-dos and projects in the Things app and compiled into this daily list, which is what's displayed on the Apple Watch.
For quick access to the daily task list in Things for Apple Watch, Cultured Code developed a "Glance" view. Swiping up on the Apple Watch's face brings up Glances, and the Things Glance offers a look at progress that's been made on a task list as well as remaining tasks that need to be completed. Like Apple's apps, Things uses a circle to help users visualize their progress -- as tasks are completed, the circle fills up.
A tap on the Things Glance view can be used to open the full Things app, where tasks can be viewed in more detail or marked as completed. Tapping on a task brings up information like due dates, notes, and the project it's in, and from this view, tasks can be postponed until another day.
To add new tasks to a list on the Apple Watch, Things takes advantage of Siri. Tapping on the "+" button within the app will bring up an option to enter a task through dictation, where it can be added to the list of daily to-dos. New tasks can also be added to the Things' Inbox by activating Siri with the Digital Crown.
Things for Apple Watch is part of the iPhone app, and as such, it's integrated into the Things Cloud that syncs all tasks across all devices with Things installed. Changes or additions to to-dos from the Apple Watch will sync to other Things apps, and vice versa.
Things for iPhone with the accompanying Apple Watch app can be downloaded from the App Store for $9.99. [Direct Link]