Prepare for the ACT with your personal AI tutor
Practice topic by topic, with every answer explained. The first topic is free, and every other topic is included in Astra AI Sigma.
Understand it. Don’t just memorize it.
On the ACT you score when you understand what the question is really asking. The questions are grouped by topic, and the tutor shows you how to approach each one.
301 practice questions across 4 topics. The first topic is free.
What does the prep cover?
The main content areas of the ACT.
English covered.
Grammar, punctuation and rhetorical skills.
Math made clear.
Algebra, geometry and trigonometry.
Reading step by step.
Passages and evidence questions.
Science with practice.
Data, experiments and conflicting viewpoints.
Practice until it sticks.
How does the prep work?
From topic to real understanding, in three steps.
1. Pick a topic
Start with the one that worries you most, or go in order.
2. Answer questions
Work through questions on that topic and see right away what you got right and what you missed.
3. Actually understand it
Your personal AI tutor explains every answer and tracks your progress topic by topic.
The first topic is free
Frequently asked questions
For high school students taking the ACT for college admission.
The prep covers the main content areas of the ACT: English (grammar, punctuation and rhetorical skills); math (algebra, geometry and trigonometry); reading (passages and evidence questions); science (data, experiments and conflicting viewpoints).
They are grouped by topic: 301 questions across 4 topics, so you can work through the whole exam one area at a time.
You try the first topic with a free Astra AI account. If you want to keep going with the other topics, you unlock them with Astra AI Sigma.
No. The tutor explains why an answer is right or wrong and helps you solve the next similar question on your own.
Astra AI Sigma gives you every official exam prep in the app, such as IB Math, plus everything in Astra AI Plus.