Calculus is designed for the typical two- or three-semester general calculus course, incorporating innovative features to enhance student learning. The app guides students through the core concepts of calculus and helps them understand how those concepts apply to their lives and the world around them. Due to the comprehensive nature of the material, we are offering the app in three volumes for flexibility and efficiency. Unit 1: Functions and Graphs Unit 2: Limits Unit 3: Derivatives Unit 4: A