Theo: AI Math Tutor

Not an answer app. Snap a math problem, grab a pen and paper, and Theo teaches you how to solve it — then marks your handwritten work in red, like a real tutor.

Theo is a math tutor for real studying.

Snap a problem from your homework, and Theo teaches you how to solve it. You work it out with a pen and paper, the way you will on a test, and Theo reads what you wrote and marks it in red. It doesn't just hand you the answer. It teaches you to get there yourself.

HOW A LESSON WORKS

• Snap your problem. Take a photo, or pick one from your library. Theo reads it, equations, fractions and all. • Theo checks the basics first. Every problem rests on a few things you were taught before. Theo asks about them one at a time, so the lesson starts from what you actually know. • Anything missing is taught on the spot. Theo shows you why it works instead of handing you a rule to memorize. • Then Theo teaches your problem, start to finish, in short pages you can follow. • Every lesson ends with a recap: just the steps that solved the problem, in one place.

ANSWER ON PAPER

Theo has no math keyboard. When it asks you something, you write your answer on paper and take a photo. Not sure? Write "I don't know." That's an honest answer, and Theo will work with it.

RED PEN FEEDBACK

Theo reads your handwriting and marks your own page in red: what you got right, where it went wrong, and what was missing, with a note beside each mark. You see your mistakes on your own work, not described somewhere else.

LESSONS THAT KEEP UP WITH YOU

Theo listens to your answers as you go. When something isn't landing, it takes smaller steps. When you've got it, it moves faster.

PRACTICE SESSIONS

When your answers show something you're missing, Theo sets up a practice session on just that idea. It waits for you in Sessions, along with any lesson you haven't finished.

WHO IT'S FOR

Middle and high school math, from pre-algebra to calculus.

YOUR PRIVACY

Your photos and answers are never used to train AI models. No ads. Ask us, and we delete your information.

SUBSCRIPTION

Checking the basics, and learning anything you're missing, is free. A subscription unlocks the rest of each lesson: Theo teaching your problem and the recap. New subscribers get a free trial.

Payment is charged to your Apple Account when you confirm your purchase. Your subscription renews automatically unless you cancel it at least 24 hours before the end of the current period, and your account is charged for the renewal within 24 hours before that period ends. You can manage or cancel your subscription in your App Store account settings. Any unused part of a free trial ends when you buy a subscription.

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