OmniOutliner
Excellent outlining tool. Good automation API for integration into other workflows.
Pro features feel lacking for price difference. Few export options.
Reviewed: Mac iPhone iPad
Reviews
MindNode
Affordable and yet elegant app. Easy to use. Web sharing through private links.
No collaboration tools. Limited feature set. No versioning.
Reviewed: Mac iPhone iPad Apple Watch
OmniFocus 3
Large feature set. Can work with both simple and advanced workflows. End-to-end encryption.
High learning curve. Mainly for Apple platforms.
Reviewed: Mac iPhone iPad Apple Watch Web
Notability
Beautiful inking. Good handwriting recognition. Powerful audio recording features. Clean structuring of loose notes and PDFs.
Few customization options.
Reviewed: Mac iPhone iPad
Due
Great replacement for built-in reminders app with more fine-granular notifications.
Too simplistic to be a full-fledged to-do list app on its own.
Reviewed: Mac iPhone iPad Apple Watch
GoodNotes 4
Handwritten detection in many languages which is even exportable. Smooth inking engine with many features.
No audio recording features. Slow development and questionable quality assurance.
Reviewed: Mac iPhone iPad
Flexcil
Providing a novel approach to work on multiple documents at once.
Lack in core functionality and customization. The overlay does not go as far as it could.
Reviewed: iPad
Noteshelf
Great Ink Engine with many different brush types. Auto-publishing to Evernote.
No OCR for handwritten text. Few customizability in options.
Reviewed: iPhone iPad Apple Watch
OmniFocus 2 [outdated]
Newer version: OmniFocus 3
Balanced trade-off between simplicity and complexity. End-to-end encryption.
Too many features for many. No non-Apple platforms. Clunky on iPad.
Reviewed: Mac iPhone iPad Apple Watch
GTDNext
Tailored to GTD workflows. Moderate learning curve and easy even for beginners.
Slow development. No mobile clients. Some features still feel a bit unpolished or unfinished. No integrations with other apps.
Reviewed: Web
Todoist
Easy and sufficient for many who look for something simple. Cheap and runs almost anywhere. Gamification.
Too simple for many advanced use-cases. Few new features over the years.
Reviewed: Mac iPhone iPad Apple Watch Android Windows Linux Web
Things 3
Beautiful, simplistic and powerful approach. Low to moderate learning curve. Great automation tools. Good keyboard integration.
Few options for customization. Missing some complex GTD power user features.
Reviewed: Mac iPhone iPad Apple Watch
MyLifeOrganized
Highly complex suite for all task management needs. Can adapt to any workflow.
Expensive. Freedom of customizability can be intimidating.
Reviewed: iPhone iPad Apple Watch Android Windows
SaneBox
Automatically trained email filtering provides a convenient way to manage incoming email.
Rather expensive when using all features. Privacy concerns.
Reviewed: Web