Solid Apps is a suite of productivity applications designed to help you manage long-term goals, build habits, journal, manage your calendar, and take notes. The suite includes applications like Ultra Focus, Formed, Solid Diary, Solid Notes, and Solid Calendar. Ultra Focus provides a framework to help you define and achieve long-term goals; Formed assists in building better habits and participating in a supportive community; Solid Diary is a 100% private AI-powered journaling app; Solid Notes is a tool for quickly capturing and organizing thoughts and ideas; and Solid Calendar is a concise calendar app with natural language processing capabilities. Each application offers unique features and benefits, catering to different needs and use cases.