When comparing Toodledo vs Zenkit, the Slant community recommends Zenkit for most people. In the question“What are the best GTD apps?” Zenkit is ranked 5th while Toodledo is ranked 6th. The most important reason people chose Zenkit is:
Easy to use and easily understandable for everyone.
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 Powerful and simple to use tool with a clean design
Easy to use and easily understandable for everyone.
Pro Many important data views
Data views include Mind-Map, Kanban-Board, Spreadsheet, List, and Calendar. Views can be switched easily.
Pro Native apps
Native apps for iOS, Android, macOS, Windows, and Linux.
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.
