Practice the format you will sit. If the official is digital, most timed cores should be on a screen. Keep paper for markup habits and for official PDFs you do not have digitally.
Screen first
Flag, highlight, and navigator tools only show up if you use them. Digital ACT tools, how to flag questions.
Paper still earns a slot
Retired official PDFs are still real questions. Use them for review and for one backup core if the online bank is thin: old practice tests.
The bottom line
Match the Saturday you paid for. A paper-only diet plus a digital official is a surprise you do not need.
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.