A free program for Android, by Caleb A. Robinson.
The Writers Companion app is an app created by the author Caleb A. Robinson to help writers stay organized and achieve their goals. It's the most popular app of its kind, and is used by thousands of writers around the world. You can use it to keep track of your progress, keep notes, make a world-building plan, and more.
Projects
You can add as many projects as you want to your app, and they'll be tied to your account. Every time you add a project, you'll get a notification. If you click on it, you'll be able to edit it and add items to it. You can also create a new project, or edit an existing one.
World-Building
The world-building tool is used to create the world in which your story takes place. It allows you to add information about the world and characters. You can add items to each project and category to help you keep track of the world and characters in your story.
Goals
Goals are used to help you keep on track to achieve your dreams. You can create and edit them and add items to them.