The ACT's Desmos can graph, table, and regress. It turns off folders, notes, images, and anything that would smuggle work in from outside the test. What you are allowed to use is in Desmos on the ACT.
What still works
Graphing lines, quadratics, circles, and inequalities. Tables. Regression. The fraction display. Zoom. The keypad for the functions you need on ACT Math. Angle mode still has to be set by you, which is in radians versus degrees.
What will not be there
You cannot paste a note, import an image, or open a folder of saved graphs from a personal account. Practice on the public site only if you ignore those extras. How to rehearse the locked version is in practicing the locked Desmos. The other on-screen tools, which are not part of Desmos, are in digital ACT tools.
The bottom line
Learn the graphing keypad. Do not build a prep habit that depends on notes or saved folders.
Start practicing
Start with a free diagnostic, then drill your weak spots with 15-question quizzes and track how you're doing across Reading, English, and Math. Compare plans whenever you're ready to go further.
This article offers general ACT prep guidance. The ACT can change from year to year, including its format, scoring, policies, test dates, and fees, so always confirm the latest details on the official ACT website at act.org before you make decisions. ACT® is a registered trademark of ACT, Inc. thirty-six is not affiliated with, endorsed by, or sponsored by ACT.