2Do provides the functionality of Omnifocus with a simplicity and aesthetic quality that rivals Things. This is no small feat. Perhaps its best implementation is start and due dates, which allow you to defer and schedule tasks by date or by time (e.g. Dec 12 vs Dec 12 at 4:30pm). In addition, 2Do allows you to customize reminders independent of due dates. Being notified of tasks before theyre actually due is essential – i.e. genuine "reminders" of whats coming up. Moreover, 2Do offers snooze notifications, which pester you with repeat reminders about a task until it is acted upon (viewed, snoozed, or deferred); this is the core selling point of "Due" (another app that 2Do mimics, but better). Why three stars? 1) Updates are infrequent and lag behind iOS releases. At the price being charged, the app should at least receive compatibility fixes within a week or two of iOS iterations (as of mid-October, iOS 10 is STILL unsupported). 2) Apple Watch??? No native watch support, which makes the app painfully slow and completely unreliable. It hasnt changed since watchOS 1, despite promises by the developer for a native app with watchOS 2. Ahem... now that watchOS 3 is out? Seriously, this is something Watch users care about. Its an especially significant drawback considering the high quality of Things and Omnifocus on the Apple Watch, which allow you to put away your phone and get down to business. 3) Siri support Technically it IS supported, albeit indirectly. 2Do can optionally sync with iOS reminders (which, in turn, work with Siri), but 2Do only syncs all metadata across multiple devices if you sync with Dropbox (which forgoes Siri compatibility). Now that Siri is open to 3rd parties with iOS 10, theres huge room to improve. Of course, this wouldnt be as big of a drawback for Apple Watch users if they actually had a usable app for quick input...but I digress. Overall, 2Do is solid, and its especially good if you want granular control over reminders, due dates, and repeat notifications. However, if you care about Siri integration, iOS compatibility, Apple Watch support, or developer responsiveness, consider yourself warned.