Calculus is designed for the typical two- or three-semester general calculus course, incorporating innovative features for student learning. The app guides students through the basic concepts of calculus and helps them understand how those concepts apply to their real lives and the world around them. The app is in three volumes for flexibility and efficiency. Volume 1 covers functions, limits, derivatives, and integration. ✨Contents of the Application✨ 1. Functions and Graphs 1.1. Review of Fun