works, step by step.Ask anything
1,51,19,000+ students already use Astra4.73 on iOS
Biology tutorStudy biology with AI
Learn biology with Astra AI. For the price of just one hour of private tuition, you get a full month of step-by-step help.
App of the DayFeatured by Apple
Have an exam coming up?
Give me everything you're studying from.
Loved by students. Trusted by parents. Built to teach biology.
Students, parents and teachers use Astra every day for biology homework, class tests and exams. It explains each process step by step and shows how it connects, so the ideas stay with you long after the test.
- Students
- 1,51,19,000
- Parents
- 1,56,000
- Teachers
- 2,10,000
Astra AI in numbers
Biology explained step by step, 24/7
Learn
See how life works, step by step.
From cells to ecosystems, Astra explains the key ideas first, then helps you see how the systems fit together.
Clear, direct answers
Key ideas first.
Recap last.
The method, not the result
Hints first.
Steps when ready.
Simplify big topics
Heavy units, one piece at a time.
Connect the dots
See how the systems connect.
How to study biology with Astra AI
Ask anything, paste notes or snap a snippet. Astra replies fast with clear, step-by-step explanations, quick examples and a recap. Big topics are sliced into mini lessons with gentle hints, so you can dive deeper, see real-world links and connect ideas across units.
Finish with a few targeted questions, get instant feedback, track your mastery and always know the next best step.
Practise
Practise until it clicks.
Understanding comes from doing. Check yourself after every concept, with feedback on every answer.
See the cell in 3D.
Practise and check yourself.
Smart Text
Flashcards
Repetition
Quiz
Podcast
Exercise
Chat
Knowledge Gaps
True / False
A page you don’t get? Just snap it.
Go deeper on demand.
Tutor is listening
Ask, speak or take a photo
Track your progress.
Learning timeLast 7 days
17 min
8 min
12 min
5 min
14 min
2 min
MonTueWedThuFriSatSun
What do parents and students say about Astra AI?
Real words from students and parents who learn with Astra AI.
“Dude, I was really sick and missed a whole week right when they started a new unit. I opened Astra AI just for fun, typed ‘explain this thing,’ and it walked me through everything from zero to done. Like… what?! I went back and didn’t feel behind at all. Guess who won’t need tutoring for a while? 😴😴”
Liam (Student) ⭐⭐⭐⭐⭐
“Just wanted to drop some feedback about Astra AI! It’s been a huge help for my little sister and three of her classmates! 👏💪 Also… it helped me too, I passed my uni exam with it!! And some people say Astra isn’t for real results. 😏🤣”
Maya (Student) ⭐⭐⭐⭐⭐
“Lowkey amazing, it lets you think for yourself but still gives super clear explanations. As a parent, it helped me explain things to my kid and actually help during study time.”
Chloe (Parent) ⭐⭐⭐⭐⭐
“Tried the AI tutor, free version only and it’s legit. Explanations are super simple, and when something wasn’t clear it broke it into tiny steps. Pretty sure I’m upgrading this week. Huge potential. Thanks!”
Jay (Student) ⭐⭐⭐⭐⭐
“Astra AI completely changed how I study. I used to grind for hours and still feel lost. Now I get clear steps, quick checks, and a plan I can actually follow. Less stress, more wins. I finally feel ready for exams.”
Ava (Student) ⭐⭐⭐⭐⭐
“I got this for my two younger kids and they were like Mom this explains everything. He can’t just copy homework anymore because it makes him pause and think about the next step. Honestly that’s the best part.”
Sarah (Parent) ⭐⭐⭐⭐⭐
“Astra helped on every test this year. When I hit a question where my brain just froze it guided me through and I could finish with confidence. Highest scores I have ever had. Respect.”
Ethan (17) ⭐⭐⭐⭐⭐
“Quick update. Both kids use it and say everything is finally clear. The teacher even called to say he participates more. He reads the explanations in advance and remembers better in class. Looks like we are saving on tutoring this year.”
Emily (Parent) ⭐⭐⭐⭐⭐
“This honestly saves my life with school work. I was never the best at studying and this explains things in a way that finally sticks. Feels like having a calm tutor in my pocket.”
Ryan (Student) ⭐⭐⭐⭐
“Quick note from a previously skeptical mom. We got this for our daughter last month and this Thursday she brought home her first top grade. She even studies after school without me asking. Homework gets done and when she’s stuck we read the explanation together. Please thank the whole team.”
Laura (Parent) ⭐⭐⭐⭐⭐
“I used to open a book and just stare. This breaks big problems into small steps and gives hints without spoiling the answer. The daily checklist keeps me moving. I actually look forward to my study sessions now.”
Jasmine (Student) ⭐⭐⭐⭐⭐
“This was kind of my last shot before a tough uni exam. I used it for three weeks and passed. A couple of answers loaded slowly once or twice but overall it kept me calm and on track. Solid.”
Daniel (Student) ⭐⭐⭐⭐
Study biology with Astra AI in three steps
From a topic that feels too big to one you can explain, in three steps.
1. Ask, paste or snap
Ask anything, paste your notes or snap a snippet from your textbook.
2. Learn in mini lessons
Get a clear, step-by-step explanation, then move through big topics piece by piece with gentle hints.
3. Practise and track mastery
Answer a few targeted questions, get instant feedback and always know your next best step.
Try it on your next topic
Start free and see how Astra explains the next topic in your biology course.
What does research tell us about AI and student learning?
Research into AI tutoring shows promise, but the way it’s used matters. The important question is what students can understand, remember, and do independently afterwards.
01
The learning happens when they take part.
02
Getting it right isn’t the same as learning it.
03
How AI helps makes a difference.
About this research
These findings come from studies of different tutoring systems and learning activities. They are not results from a study of Astra AI.
Students learned more than twice as much.
In a Harvard study, students using a purpose-built AI tutor achieved more than double the learning gains of students in an active-learning classroom - in less time.
Frequently asked questions
Astra AI is an advanced learning tool that uses artificial intelligence to provide personalised study support. It helps you understand complex concepts, offers tailored solutions and encourages independent learning.