TickTick is described as 'Manage time efficiently, organize tasks with lists and tags, and set priorities. Share task lists, attach files, and use collaboration tools' and is a very popular todo list manager in the office & productivity category. There are more than 100 alternatives to TickTick for a variety of platforms, including iPhone, Web-based, Android, iPad and Mac apps. The best TickTick alternative is Super Productivity, which is both free and Open Source. Other great apps like TickTick are Notion, Trello, Todoist and Tasks.org.