When comparing Things 2 vs Nozbe, the Slant community recommends Things 2 for most people. In the question“What are the best cross-platform task apps?” Things 2 is ranked 24th while Nozbe is ranked 35th. The most important reason people chose Things 2 is:
Users need to create an account for Things Cloud (the account can be created from any device). Once signed up, cloud sync will be active, and you’ll have to login on all of your devices to complete setup. From that point on, syncing happens in the background. It is invisible and always reliable.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Cloud sync
Users need to create an account for Things Cloud (the account can be created from any device). Once signed up, cloud sync will be active, and you’ll have to login on all of your devices to complete setup. From that point on, syncing happens in the background. It is invisible and always reliable.
Pro Daily review
At the beginning of every day, a yellow box appears at the top of the Today section, displaying all tasks scheduled for this day. You can investigate them, and then decide which ones you’ll have for that day and which one you’d rather want to delay.
Pro Easy to set up and use
Things 2 works from the moment you start it up. Simply add a task and when you want it done by. You can also add notes to tasks or tag when you need them. Things allows you to quickly and easily start keeping track of your tasks.
Pro Project support
Things 2 has a projects feature that allows you to organize your tasks together. You can select a project you need to get done and Things helps you focus on each task to get it done. You can even group projects together to focus on the most important aspect of your life at the time.

Pro Great for GTD
Things is one of the best apps of doing Getting Things Done.
Pro Nested tags
It's very easy filtering tasks that belong to various areas (etc private vs work)
Pro Responsive and easy naviagation
Logical and responsive navigation and editing. Easy to operate.
Pro Customized calendar
The calendar view (when selecting a due date for a task) is a customized, scrollable version of the default iOS calendar view. This makes it look familiar, but also functional for Things 2's requirements.
Pro Cross-platform
With Nozbe you can manage and get your tasks done anytime and anywhere. Nozbe has apps for iOS, Android, Windows Phone, OS X, Windows, and Linux, as well as a universal web interface. The sync works smoothly and handles off-line work responsively – all the work saved on your device will be synced to the servers as soon as you’re back online.
Pro Great real-time team collaboration features
Nozbe can be a perfect tool to manage communication, data, and workflow for teams – large and small. Features like comments, @mentions, admin/guest roles, attachments, and categories are great for managing all the documents and emails associated with a project. You can also invite people who don't have Nozbe account to participate in your projects.
Pro Nice and simple user interface
Nozbe is based on Getting Things Done (GTD), a productivity philosophy created by David Allen. However, you don't need to know the methodology to use the tool. You can just add projects, tasks, and attachments, and gradually learn to use the other features to organize your time even better.
Pro Practical integrations with some favorite tools
Nozbe integrates with email, Evernote, Dropbox, Google Drive, Box, Google Calendar, etc.
Pro Nozbe.HOW templates
Nozbe users curate a vast collection of free templates that share everything from favorite recipes to tried-and-true vacation itineraries.
Pro Highly intuitive and works the same way across all platforms
Cons
Con Expensive if you buy apps for Mac, iPhone and iPad (all sold separately)
As at May 2016 if buying all three apps it cost $80! That said there is no annual subscription and I've been using Things for years and have only paid once so far.
Con Poor calendar view
Could be more convenient with calendar interaction. Not an ordinary approach for visual people, if you want to see all the calendar events in the familiar format.
Con No file attachment available
Con No supported time based/location based alarms
Other apps have these abilities, and they are very useful. Especially for a $10 app, it would be great to include these premium features.
Con Limited free plan
After the free trial you can choose to remain on a free plan, but you’ll be restricted to a max of 5 projects and will have limitations on collaboration.
Con Task dependencies missing
Nozbe is great, but one shortcoming relates to "task dependencies" in projects. You should be able to sequence your tasks so that, when you complete a task, the next one that needs to be done becomes the "priority" task for that project. This is a vital feature that will make the program dramatically more useful. The company claims to be working on this improvement.
