When comparing Task Coach vs Checkvist, the Slant community recommends Checkvist for most people. In the question“What is the best cross-platform to-do list app?” Checkvist is ranked 19th while Task Coach is ranked 20th.
Specs
Question Ranking
Pros
Pro Free and open source
With access to the source code, savvy users can make under-the-hood tweaks to suit their work style.
Pro Unlimited nesting of items and lists
When things grow in complexity, their parts can be turned into discrete task items within a hierarchical structure.
Pro Tracks hours and budget
Task Coach allows you to track how long it actually takes to complete a task and can be used to analyze the resulting impact on billing and budget.
Pro Tracks percent finished
Pro Tasks can be managed with custom tags
Pro vim-like commands
Pro Convenient search by text or tag filtering
Pro Converts incoming emails to todos - this is a way to enter tasks from anywhere.
Pro Great search
Search filters help you search for tasks by tag, due date, assignee, etc.
Pro Very flexible
To-do lists often need to be grouped and regrouped for clarity. The outline-based nature of Checkvist makes it easy to move things across categories, to increase and decrease priority, etc.
Pro Smart parsing of items
Parses markdown, html links, hashtags to become formatted text, clickable links, and tags, respectively.
Pro Generous set of free features
Checkvist offers many free features if you are using this individually.
Pro Supports comments on tasks
Any item can have a free-text comment, which can be shown or hidden as desired.
Cons
Con Multiple users can access a file over a network, but there’s no web-based interface for straightforward collaboration
A task file may be opened by several instances of Task Coach, either running on the same computer or on different ones (on a network share for instance). When you save, Task Coach will merge your work with whatever has been saved on the disk prior. Conflicts are automatically resolved, usually by you winning the conflict.
This serves two use cases: 1) A single user opening the task file on several computers (work, home, laptop) and 2) several users working on the same task file.
The first case is the most common and the most secure. The second case may be dangerous. Most network disk sharing protocols do not support the kind of file locking that would make this 100% secure. A list of common protocols and their behavior can be found in the Task Coach help file.
Con Limited capability in the android app
Checkvist is primarily a web interface.