When comparing OmniFocus 2 vs Workflowy, the Slant community recommends Workflowy for most people. In the question“What are the best cross-platform task apps?” Workflowy is ranked 4th while OmniFocus 2 is ranked 36th. The most important reason people chose Workflowy is:
Any sublist can be viewed as a top-level list. This sounds simple but makes WorkFlowy extremely powerful. For example, the same line item, "write my book," can simultaneously be a to-do in a task list and the container for an entire working document.
Specs
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Pros
Pro Organize tasks into projects
OmniFocus 2 allows you to organize tasks into Projects, allowing you to keep your tasks organized in the best way to stay efficient for that project. Each task also features summary dots. For example, red means the task is overdue and orange means its due soon. There is also a range of other dots that can be specific to projects.
Pro Forecast summary
The Forecast Summary shows a quick glance of the tasks you have that day. You can tap on any day to quickly see what tasks you have planned that day. For extra functionality you can connect the iPhones Calender app, which allows you to also see any other events you have planned that day.
Pro Excellent full stack support from phone, to tablet, to Mac
With very good synchronisation.
Pro See an overall view of tasks via "Perspective"
The Perspective section allows you to see an overall view of the tasks you have set. It also allows you to set contexts or see things you have flagged.
Pro Superbly customisable via Perspectives
Pro Picks up reminders added via Siri
Pro Best support for GTD in the marketplace
This really supports the implementation of David Allen's Getting Things Done
Pro Nearby and context-sensitive tasks
OmniFocus 2 allows you to set up contexts for tasks in certain areas. This makes sure you never miss a task when you're out running errands or happen to be near something you need to do. Just set contexts around places you frequent or set as a specific task.
Pro Client side encryption
Pro Apple Watch integration
You can send lists from your iPhone, and get notifications on your watch each morning with any tasks you have set for that day.
Pro Outline-style hierarchy with zoom
Any sublist can be viewed as a top-level list. This sounds simple but makes WorkFlowy extremely powerful. For example, the same line item, "write my book," can simultaneously be a to-do in a task list and the container for an entire working document.
Pro Minimalistic interface
Interface has no clutter. It allows focusing on thoughts to note down. This keeps things simple and easy to understand, which can help keep everything organized in an intuitive manner.
Pro Easy to see an overview and organize notes
All notes are part of a list, which makes it easy to organize everything. Nested lists allow for organizing notes into hierarchical categories of infinite depth. All lists can be folded. WorkFlowy also has tags and instant full-text search.
Pro Super fast sync between devices
While adding a list of to-do on web, it syncs with iPhone and iPad apps very quickly. This way you can jump between devices with no delay of up to date content.
Pro Quickly focus on a specific topic
Enables users to focus on specific topic area, which is referred to as "hoisting" within Workflowy.
Pro Supports tags
Enables users to search by tags.
Pro Cross-platform web and mobile
WorkFlowy can be accessed from either a browser or their apps, which include a Chrome app for desktops as well as an iOS and Android app. This makes it easy to access ones notes no matter the platform or device being used.
Pro Deep nesting
Workflowy's 'everything is in a tree' interface makes it easy to keep expanding on topics, no matter where, or how deep in the hierarchy they are.

Pro Tasks can be added and manipulated quickly
WorkFlowy allows entering many tasks very quickly – especially useful for meeting minutes or a "brain dump" when you have to type fast. After typing in all your thoughts, it's very easy to organize and sort multiple groups at once.
Pro Import and export via OPML
OPML (Outline Processor Markup Language) is a commonly used standard for text exchange. With two-way support for OPML you are never locked into Workflowy. Importing/exporting via copy/paste of entire outlines is a snap.
Pro Text formatting
You can have bold, italic, and underlined text.
Pro Strong community
There are number of talented coders who help customize WorkFlowy with extensions and styles. It has an active blog and welcomes collaboration.
Pro Daily digest email
WorkFlowy can send you an email with that day's activity. It's a great way to track progress.
Cons
Con Very expensive
$40 for a to-do-list app is a bit much, even with all the other features it offers.
Con Limited to Apple devices
Must be used as a native Mac, iPhone, iPad, or Apple Watch app. There's no cross-compatibility with Windows, Android, or web.
Con Only one context (tag or label)
This won't stay a con for long. With the pending version (Omnifocus 3) to be launched in 2018, Contexts are being replaced by Tags. Yes, finally...you can have as many contexts as you like for a particular action.
Con Slow sync in Europe
Con Doesn't work well in mobile browsers
The functionality of the mobile version of the site is a bit limited, while new features have been added such as the ability to move lines of text, even that is limited on Android to only being functional on Chrome.
Con Offline desktop app requires Chrome
The offline desktop requires installing Google Chrome first before the WorkFlowy app can be installed. This is not good news for non-Chrome users especially users who frequently uses Firefox or Safari as their default browsers, in which Chrome app also suffers memory leak and battery issues.
Con Inconvenient interface
Notes automatically collapse, making them unreadable without user interaction. You cannot view multiple long notes at once.
Con No public API
Con Cannot use link-text
You cannot have text link to a URL. When you link to a website you have to post the full URL instead. Instead of having the name of the website or article like, Slant, you instead have to post http://slant.co
. It's especially annoying if you have a long URL that takes up a lot of space in the document.
Con No support for Right-To-Left languages
Mixed text is scrambled, and text-alignment is wrong.
Con Doesn't work on all mobile phones
Not compatible with Android OS version 4.1 and 4.2.
Con Infrequent updates and new features
WorkFlowy works well but it is hardly ever updated, in comparison to Dynalist, which works in a very similar way but has more features and is updated weekly.
Con Only supports one big text file
Although with Workflowy's focus feature this can work, you might prefer managing separate text files.
