An AI study app that quizzes you on your own class material.
Axo is an AI study app for iPhone that turns a class PDF, your notes or photos of pages into five-minute lessons with a quiz in each one. It uses only what is in your material, every question names its page, and spaced review brings each idea back before you forget it.
By the Axo team · Last updated November 9, 2026
From the reading to the test.
Reading a chapter again feels like study and does little. Answering questions about it is what makes it stay. Axo turns the first into the second.
Add what the class gave you.
A PDF, an ePub, your typed notes, a link to an article, or photos of pages from a book or a handout.
Pick a reading level.
Plain, Standard or Technical. The wording changes with the level. The facts do not.
Take one Bite at a time.
Five to seven minutes: a scene, a short read, then five questions. Each question names the page it came from, so you can check it against the source.
Pass the capstone.
Sixteen questions across every unit. You pass at 80 percent. Retries are free and pull different questions.
Let Keep Sharp run.
Each idea comes back right before you would forget it, mixed with ideas from your other Paths. On review you type the answer from memory.
Bring your own
Here’s what I found.
limb-regeneration-review.pdf
14,260 words
seminar-transcript.txt
41 minutes
notes-photo.jpg
Too blurry to read. Skipped, and I said so.
- Found four units
- Every question names its page
- Nothing added that isn’t in your files
What students bring.
Anything you have to know and can put in front of Axo.
- “The class PDF the whole study group needs”Invite a friend to the Path. You each learn it on your own copy and see each other on the trail.
- “My lecture notes from this week”Pasted or as a text file. They become units, Bites and questions.
- “Photos of chapter 4”Read page by page. A photo too blurry to read is named before the Path is built.
- “A topic I never understood”No document needed. Name the topic and Axo builds a Path from scratch.
What a student gets.
| What | Number | Note |
|---|---|---|
| Questions per lesson | 5 | Plus a 10-question check per unit and a 16-question capstone. |
| Lesson length | 5 to 7 minutes | Short enough for the time between two classes. |
| Words per Path | Up to 30,000 | A longer reading becomes a series, one Path per part. |
| Facts added by the AI | 0 | A Path from your document uses only your document. |
| Free Paths a month | 2 | Free, forever. Plus builds 15 a month and Pro builds 40. |
| Learn together | Friend by friend | Each person learns on their own copy. |
Why it fits study.
Three findings from the research on memory decide how Axo works. Each one is the opposite of a common study habit.
- Questions beat rereading
- Pulling an answer out of memory strengthens it far more than reading the page again (Roediger and Karpicke, 2006). So every Bite ends in questions.
- Spacing beats cramming
- A review just before you would forget flattens the forgetting curve. Axo has no cramming mode.
- Mixing beats blocks
- Keep Sharp mixes ideas from different units and Paths. It feels harder and works better.
Questions people ask.
Can Axo make a quiz from my class notes?
Yes. Paste your notes or add them as a file, and every Bite of the Path ends in five questions drawn from them. Each question names where it came from.
Does Axo make up facts that are not in my textbook?
No. A Path built from your document uses only what is in your document. A Path from a typed topic comes from the AI’s general knowledge, so check anything that matters for a grade.
Can my study group use one Path?
Yes. Invite a friend to a Path and you learn it side by side, each on your own copy. Friends see each other on the trail.
Is Axo free for students?
The Free plan is free forever for everyone: two new Paths a month, with Keep Sharp on three Paths. There is no separate student price.