Studying hasn't really changed in a generation. You read a chapter, you re-read a chapter, you make a half-hearted attempt at flash cards, you Google a practice quiz from 2014. The tools haven't kept up with how anyone actually learns.
Airo is our attempt at a tool that does keep up. Drop in your notes, your textbook chapter, your slide deck, your lecture recording — and Airo turns it into a quiz you can actually take, with explanations that go past "the answer is C."
What Airo does
Generates quizzes from anything. PDFs, slides, plain text, screenshots, handwritten notes. If you can study from it, Airo can quiz from it.
Multiple question types. Multiple choice for fast review, short answer for recall, matching for vocabulary, free response when you want Airo to read what you wrote and tell you where it landed.
Explanations that teach. Every answer has a breakdown — why the right answer is right, why the wrong ones look plausible, where in your source the idea came from.
A study chat. Stuck on a question? Ask Airo directly. It already has your source material in context, so the answers stay grounded in what you're actually studying instead of wandering off into the rest of the internet.
Built around how learning actually works
We built Airo around three ideas. First, recall beats re-reading — actively trying to remember something is what moves it from short-term to long-term memory. Second, quick feedback matters more than perfect feedback — being told you're wrong in the moment is more useful than a graded paper a week later. Third, you should be able to study with the materials you actually have, not the materials a textbook publisher decided to sell.
Airo isn't designed to do your homework for you. It's designed to help you understand the material so you don't have to.
What it costs
Free, on every Invariant account. There's a generous free tier that's intentionally usable — not a 24-hour trial that locks at midnight. Paid plans add higher limits, faster generation, and collaboration features for study groups.
What's next
We're already working on the things you'll ask for first: shared study sets, spaced-repetition flashcards, study-guide generation, and tighter integration with Pluto. Keep watching this page — Airo is going to move quickly.
Try it today. Learn something hard. Let us know how it went.