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The AI learning app for iPhone

Regrow your brain.

Feeds keep you scrolling. Chatbots keep you asking. Neither cares whether you keep anything. Swap one doomscroll for one Bite: five minutes on any topic, or any document you paste in, that you actually finish and remember.

Get Axo for iPhoneTry a Bite

The app is free to start. The Bite here needs no sign-up.

9:41

Ask Axo

What do you want to know?

Or pick one people ask for

Every Path has the same shape

16 Bites of 5 to 7 minutes. About 2 hours. Then review that keeps it.

Tap a topic or type your own.

A preview with mock outlines. In the app, the outline appears in under 10 seconds and the first Bite in under 20.

What Axo is.

Axo is an AI learning app for iPhone that turns any topic, or any document you paste in, into a short course you actually finish. Each course (a Path) is 16 five-minute Bites across four units, ends with a capstone you pass at 80%, and is followed by spaced review that brings each idea back right before you’d forget it. Your guide is Axo, an axolotl who reacts to every answer.

Brainrot isn’t your fault. It’s a business model.

The feed is built to be endless and the chatbot to be instant. Both get paid when you come back, not when you remember. So you end the day full of answers and walk away with none of them.

Axo is built to be finished. The same knowledge as a Path: four units, sixteen Bites, questions instead of summaries, and a review that comes back right before you’d forget. Five minutes, and you’re better in a conversation on Friday.

An axolotl regrows what it loses: a limb, a jaw, part of its brain. So can you, one Bite at a time.

What a chatbot gives you

You read it. You skim it. By Friday, it’s gone.

What Axo gives you

  1. Unit 1

    The cap and the tax

  2. Unit 2

    The exceptions

  3. Unit 3

    The two aprons

  4. Unit 4

    Why the draft matters

  5. Capstone

    Pass at 80% to earn the badge

Then Keep Sharp brings each idea back right before you’d forget it.

Two doors in. One loop.

Bring the material you already have, or describe what you want to know. Either way, Axo builds a Path with the same shape: four units, sixteen Bites, a capstone, and review that keeps it.

Bring your own.

Paste a document, a PDF, a transcript or your notes. Axo rebuilds it into units, Bites and questions. It never adds a fact that isn’t in your file, and every question names its page. Invite a friend and you learn it side by side, each on your own copy.

Over 30,000 words becomes a two-Path series instead of an error. A file it can’t read gets named, not buried.

How a PDF becomes a course
9:41

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

Build me a course.

Say what you want to know and by when. A short chat pins down your goal and your level, then Axo writes a Path scoped to you and teaches it the way that kind of thing is learned: steps for a recipe, situations for people skills, the slip to spot for grammar.

Enough NBA for Friday. HVAC basics for a first job. Contract law for a freelancer. Whatever it is, it ends.

How a topic becomes a course
9:41

Ask Axo

What do you want to know, and by when?

Enough NBA to keep up with my friends. Game’s Friday.

Got it. Casual fan, about two hours. Your Path is ready.

NBA, enough for Friday

4 units · 16 Bites · about 2 hours. Taught as rules and what applies.

Every Path has an end.

Half of the open online courses (MOOCs) in one study of 221 were finished by fewer than 12.6 percent of the people who started them. Ours are built to be finished: a fixed shape, a visible rail, and a capstone you have to pass.

  1. Step 1

    Bring or ask.

    Paste what you have, or tell Axo what you want to know and by when.

  2. Step 2

    Path is built.

    The outline in ten seconds, Bite 1 in twenty. The rest builds while you start.

  3. Step 3

    Bites.

    Five to seven minutes each. A scene, a read, then five questions. XP only for real recall.

  4. Step 4

    Finish line.

    A capstone across every unit, a badge, a level up, and an honest ending.

  5. Step 5

    Keep it sharp.

    Spaced review of what you learned, or Go Deeper into a new Path one level down.

A Path
Four units, about two hours. A hard cap. Longer topics become a series, each level finishable alone.
A unit
Four Bites and a unit check of ten mixed questions.
A Bite
Five to seven minutes. Axo teaches twice, a scene and a read, and asks five times. One idea per screen.
The capstone
Sixteen questions across every unit. Score 80 percent to earn the badge. Retries are free and pull new questions.

Learn something about an axolotl in three minutes.

One Bite. Five questions. No sign-up. It’s the fastest way to feel what Axo does, and you’ll leave knowing why scientists are obsessed with this animal.

Start the Bite

Built on how memory actually works.

Retrieval beats rereading. Spacing beats cramming. A little difficulty is what makes memory form. Every exercise and every schedule in Axo traces back to one of eight findings that have held up for decades.

Retrieval practice
Every Bite ends in questions, not a summary. Keep Sharp is all retrieval. There is no “review the text” screen without a question attached.
Spaced repetition
Each concept gets a memory score and a next-review date. Keep Sharp pulls what is due today, across all your Paths.
Desirable difficulty
A question that comes back is asked another way than you first met it, and on review you type the answer from memory. Review sessions mix topics.
Interleaving
Keep Sharp interleaves concepts from different units and Paths. Capstones mix every unit.
All eight principles, and what we refuse to doHow to remember what you learn: the four methods
How fast you forget, and how spacing changes it.

A model, not a measurement. Each review resets the curve and flattens the next one.

  • Read once
  • With Keep Sharp
25%50%75%100%Day 07142130Read once 0%Keep Sharp 12%

2 of 4 reviews, on days 1, 3

Table view
DayRead onceWith Keep Sharp
0100%100%
166%100%
329%100%
75%73%
140%42%
210%24%
300%12%
How Keep Sharp beats the forgetting curve

Pay for Paths, not for learning.

Two new Paths a month free, forever. Plus sits just under Duolingo Super. Nobody ever sees an “AI credit.”

Free.

$0

Two new Paths a month, Keep Sharp on three Paths, Axo’s own voice reading every Bite, and three fresh Stream clips a day.

Plus.

Most people pick this

$9.99 a month

or $59.99 a year, 14 days free

Fifteen new Paths a month, Keep Sharp on every Path, all nine narration voices, and six fresh Stream clips a day.

Pro.

$19.99 a month

or $119.99 a year

Forty new Paths a month, Keep Sharp on every Path, all nine voices, twelve fresh Stream clips a day, and new features first.

The full comparison and the questions people ask

Read more before you decide.

Each part of Axo has a page of its own, and each claim about memory has an article with its sources.

Questions people ask.

Short answers to the first things people want to know. Read every question.

What is Axo?

Axo is an AI learning app for iPhone that turns any topic, or any document you paste in, into a short course you actually finish. Each course (a Path) is 16 five-minute Bites across four units, ends with a capstone you pass at 80%, and is followed by spaced review that brings each idea back right before you’d forget it. Your guide is Axo, an axolotl who reacts to every answer.

Is Axo free?

Yes. The Free plan gives you two new Paths a month, forever, with spaced review on three Paths. Plus is $9.99 a month or $59.99 a year with 14 days free, for fifteen new Paths a month. Pro is $19.99 a month or $119.99 a year, for forty.

Can Axo turn a PDF into a course?

Yes. Add a PDF, an ePub, a text file, a link to an article or photos of pages, or paste the text, and Axo builds a Path from it. It never adds a fact that isn’t in your file, and every question names its page. One Path holds up to 30,000 words; a longer document becomes a series, one Path per part.

How is Axo different from ChatGPT?

A chatbot gives you an answer. Axo gives you a course with an end. Every Bite finishes in questions instead of a summary, every Path finishes in a capstone you have to pass, and spaced review brings each idea back before you forget it. You read a chatbot’s answer once. Axo checks that you kept it.

Is Axo like Duolingo for anything?

The habit is the same: short lessons, a streak, and a mascot who reacts to you. The subject is the difference. Axo has no fixed catalogue. You name a topic or bring a document, and it builds the course for you. Each course also has an end: sixteen Bites and a capstone, then review.

How long is a course?

About two hours. A Path is four units of four Bites, and one Bite takes five to seven minutes. It ends with a 16-question capstone that you pass at 80%. After that, Keep Sharp brings the ideas back in short review sessions.

When is Axo available?

Now. Axo is on the App Store for iPhone, on iOS 16.4 or later. You can also play one Bite on this site, with no sign-up.

Who makes Axo?

Parcel Digital LLC, a Nevada company in Las Vegas. Axo, the AI learning app with the axolotl, lives at getaxo.app. It is not connected to any other app or company with “Axo” in its name.

Now on iPhone.

Swap one doomscroll for one Bite. Any topic, or any document you add, becomes a short course you finish and remember, with Axo reacting to every answer.

Get Axo for iPhone

Free to start. Needs iOS 16.4 or later.