Every student deserves access to a powerful graphing calculator. The real TI-84 costs $100+ — a barrier for millions of students worldwide. CalcOS removes that barrier entirely, providing the same functionality for free, in any browser, on any device.
Built by math students who were tired of paying for hardware they only needed digitally.
Students, teachers, and professionals across 150+ countries use CalcOS every month.
New features and improvements ship regularly based on user feedback and requests.