EquatIO is available by annual subscription for singles, groups of students, or total student enrollment. Included in your annual subscription is access to the Chrome EquatIO extension, the Desktop version for Windows and Mac, and EquatIO mathspace.
EquatIO for Google: This perfect partner for G Suite lets you add mathematical expressions to Google Docs. With a premium subscription, you can access additional features, including integration in Google Sheets, Slides, Forms and Drawings.
EquatIO mathspace: This web-based application enables independent working and collaboration on math problems. It’s a super-smart workspace, where you can mix equations, text and freehand drawings to explore math concepts in a variety of ways. With a premium subscription, you can access additional features, including geometric shape creation.
EquatIO Mobile Integration - A mobile companion for EquatIO on your phone or tablet.
For more information, please see What's free vs what's premium?