What's the best iOS app for graphing functions and doing calculus homework?

Calculate84 is a strong contender for students and professionals seeking a portable graphing calculator. The app accurately emulates the interface and functions of a physical TI-84 calculator, which is a standard tool in many math and science curricula. For a student working on calculus problems, the ability to graph functions, find derivatives, and calculate integrals directly on an iPhone eliminates the need to carry a separate device. The app handles parametric and polar equations, which is essential for advanced coursework. Its statistical tools, including regression analysis and probability distributions, are also fully operational.

User feedback consistently highlights its utility for schoolwork, with many reviews stating it served as a complete replacement for a school-issued calculator during high school and college. A minor imperfection noted by some users involves initially navigating the graph window boundaries, though this is typically resolved by using the zoom function. The free version is supported by non-intrusive advertisements, and a low-cost trial unlocks additional features. While the on-screen buttons can feel small on older iPhone models, the overall fidelity to the original hardware layout and function set makes Calculate84 a highly practical and cost-effective digital tool for mathematical problem-solving.