When comparing Toodledo vs Moo.do, the Slant community recommends Moo.do for most people. In the question“What are the best cross-platform task apps?” Moo.do is ranked 11th while Toodledo is ranked 23rd. The most important reason people chose Moo.do is:
You can use tags like @next, @today, @tomorrow, and you will see all your tasks in agenda panel.
Specs
Ranked in these QuestionsQuestion Ranking
Pros

Pro Can create to-do items via email
It's possible to create a to-do item by sending or forwarding an email.
Pro Decent filtering and sorting
Pro Priority organizing
Pro Great GTD implementation
The GTD principles are very perfectly supported by Toodledo.
Pro Functionality-rich
Integrated sharing, note taking, habit tracking, and outlining make this a more powerful tool than a simple list of to-dos.
Pro Upload From CSV
Quickly upload an excel (CSV) file template of tasks to a folder for complex but repeating projects.
Pro Well documented, free-to-use JSON API
If you adopt Toodledo as your productivity system, you can be confident that you can extend it to fit your needs with this programmatic access.
Pro Can tag items
Pro Space to add lengthy text
Notes area that can then be hidden.

Pro Sends a daily email reminder
Toodledo reminds you via email of the tasks on your plate for the day.
Pro Apple Watch support
Integrated support for Apple Watch lets you check on your to-dos on the run.
Pro Agenda panel lets you see all your tasks
You can use tags like @next, @today, @tomorrow, and you will see all your tasks in agenda panel.
Pro Offline editor
Pro Very easy to get started with
Despite having many different features, Moo.do is extremely intuitive to use right from the start.
Pro Indefinitely nested lists of items
There is no limit to how many nested lists you can create. This gives you a lot of freedom structuring your ideas.
Pro Actively being developed
Pro Lets you view multiple panes
The multi-pane feature allows you to view lots of information on the same screen so there is no need to frequently switch between pages.
Pro Very fast to use
Very fast application which is useful when you want to brainstorm. No lags at all.
Pro Kanban
Kanban boards.
Pro Markdown
Markdown support.
Pro Multiple priority levels
You can quickly tag any of your content with one of the priority levels to help you stay organized and address the most important tasks first.
Pro Three different themes to choose from
You have three options (classic, outliner, and dark) for themes. The differences are specific to how your content is formatted (for example: how bullets are displayed, if at all). You can also toggle the "grayscale" option if you don't want your tags to be in color.
Pro Well designed interface
The design of the interface was well thought out. Despite the abundance of features, the interface is intuitive to navigate. It has a very clean, minimal design.
Pro Easily filter data using tags
You can #tag words anywhere throughout your notes in order to easily find them and keep similar notes organized.
Pro Turn your email into a todo list
Moo.do has an application for gmail that lets you fully organize your emails and turn them into a todo list. E-mails can be organized into different folders including what needs a reply, the priority levels, what is completed etc.
Pro Ability to zoom in/focus on a branch
Pro No limit on list items in the free version
Cons
Con Free version limited to 20 folders
Con Android app has annoying notifications
Whenever the app fails a background sync action for any reason (server issues, lack of internet connection, etc.), a notification appears.
Con Good as a starting point
Toodledo is a good starting point, but is essentially the same as an Excel spreadsheet where you have to build your workflow via the saved searches.
Con Interface can feel distracting
Moo.do offers a variety of features that can make for a distracted experience. Rather than being encouraged to focus on the task at hand, you may find yourself tempted to flip through other panes.
Con Undo / redo
Undo / redo can be buggy.
Con No API
Con No wiki-style cross references
Con Inability to add images to the outline
This is now possible
Con Currently lacks notifications for changes in panes
