What is Legend?
Legend is designed to be the best and easiest way to keep your life and thoughts organized: projects, to-do lists, appointments, contacts, reminders, events, and anything else you want to write down. As all modern apps should be, Legend is available on any computer, tablet, or phone and synchronizes all devices and users in realtime.
Legend is a powerful system for managing your life without adding extra overhead. Legend's interface stays out of the way so you can focus on the content. Rather than make you learn and adapt to a complicated new organization app, you can write as you normally would on paper or a simple text editor, so you can organize your way.
All notes are encrypted end-to-end, which makes it a standout privacy-friendly alternative to other popular apps.
Comments and Reviews
Said about Legend as an alternative
It has both task management and task scheduling, the core features of Plan.
Outliner with tight GMail integration
Basically it's Workflowy connected to your Gmail, Google Drive, contacts and calendar. Yes it has an agenda view, you can directly work with your emails in it and it still looks as simple as Workflowy. It lacks only one or two features like having a URL for each node.