Best AI Tutor in 2026: 5 AI Tutors Compared, and How to Choose

Short answer: the best AI tutor depends on how you get stuck

The best AI tutor for you is the one that fits the way you get stuck and the way you study. Most AI tutors can explain a step; they differ in whether they hold back the answer, what you can feed them (a typed question, a photo, your own notes), who is allowed to sign up, and what they cost.

• If you want an AI that won't hand over answers and you live in the US, look at Khanmigo from Khan Academy.
• For a free general assistant with a step-by-step learning mode, try Gemini with Guided Learning.
• Already studying with flashcards and practice tests? Quizlet's AI tools build on that.
• Parents of a teen in grades 7 to 12 who want to be kept in the loop can look at Brainly.
• To learn from your own notes toward a test date, look at Astra AI, which is our product.

If you first want to know how AI tutoring works, read what an AI tutor is.

How we compared the AI tutors

Five questions, applied to every AI tutor the same way:

1. Does it guide you to the answer or just give it, in the vendor's own words?
2. What can you bring to it: a typed question, a photo, your own notes?
3. Who is it for: age, grade and country limits.
4. What does it cost as published, and what is free?
5. What can't it do?

Facts come from each vendor's own website or official blog, checked on 8 October 2026. We did not test-drive the tools and there are no scores or rankings; the list is in no particular order, with our own product last. Astra AI is our product. It appears under the same rules, with a drawback.

Five AI tutors compared

Khanmigo (Khan Academy)

Khan Academy says Khanmigo never gives you the answer; it prompts you to work problems out yourself. It is built into Khan Academy's content library, so you can get help on its exercises, videos and articles, and it covers elementary school through college in almost any academic subject, including math, science, coding, history and humanities. You can talk to it instead of typing, and it can read its responses aloud. For learners and parents it costs $4 a month or $44 a year, sales tax not included. The Khan Academy library itself stays free.

Drawback: per its FAQ, buyers must be 18 or older, live in the US and have a US billing address. Under-18s need a parent to sign up, and a parent account can add up to 10 children. Classroom access only comes through school or district partnerships.

Gemini with Guided Learning (Google)

In August 2025 Google added a mode called Guided Learning to the Gemini app and said it was rolling out to everyone. Google describes it as breaking problems down step by step and adapting explanations so you understand the "how" and "why" instead of getting a quick answer. Gemini's help center still explains how to switch it on at gemini.google.com and says the learning tools are reaching the mobile app gradually. Its students page adds study notebooks built from your uploaded course materials, personalized quizzes and Gemini Live for real-time conversations. Gemini's plans page lists a Free plan at $0 a month with a Google Account, Google AI Plus at $4.99 a month and Google AI Pro at $19.99 a month (US prices).

Drawback: it is a general-purpose assistant rather than a school product, and which features you get depends on the plan. Google's paid AI plans are for ages 18 and up. The free one-year student offer is only for eligible US college students aged 18 and over, must be redeemed by 31 December 2026 and needs a payment method; Google says AI Pro then renews at $19.99 a month unless you cancel.

Quizlet

Quizlet's AI tools page lists AI Homework Help, which it describes as AI-powered tutoring with alternate solution methods, deeper concept breakdowns and personalized practice. The same page lists AI practice tests from your notes, a study guide generator for notes, slides or PDFs, a PDF summarizer and an AI flashcard maker. Quizlet says you can start with some AI features for free, and that more advanced capabilities are in Quizlet Plus.

Drawback: the pages we could read don't show a price for Quizlet Plus, and they don't list which AI features are free. Most tools on that page turn your material into tests, guides and flashcards, so it leans toward revision more than a long back-and-forth about one problem.

Brainly

Brainly's homepage describes AI homework help and test prep for every subject in grades 7 to 12. It says it chooses between a full explanation, a nudge or a question back, depending on whether the student is missing something or trying to hand the work over. In its Worksheets, the next step stays locked until the current one is right. A learning advisor keeps parents in the loop, you can add a weekly human tutor, and there is a 100% money-back guarantee for the first 30 days. Its help center lists Brainly Plus and Brainly Tutor plans, monthly or annual, and a 7-day free trial of Brainly Plus for first-time users.

Drawback: the pages we checked don't show a price. Brainly's help center says pricing varies by platform and points to its subscription page. The homepage is written for parents of teens in grades 7 to 12, so it is not aimed at university students.

Astra AI (our product)

Astra AI tutors step by step, asks you questions back and checks your understanding; the answer comes last. You can photograph a question, ask follow-ups, and upload your notes, textbooks, slides or past papers, so lessons, quizzes, flashcards, podcasts and mock exams come from your own material. Its pages say it adapts from middle school through university. Exam Prep builds a plan to your test date, and the mobile app runs on iPhone, iPad and Android. You can start free without a card, and Astra AI Plus unlocks unlimited tutoring, mock exams and podcasts.

Drawback: no human is involved, and the free plan limits tutoring. Astra AI Plus prices are shown on Astra AI's upgrade page.

Comparison table

As published on each vendor's own site, checked 8 October 2026. Prices can differ by country and app store.

AI tutor	How it helps (vendor's words)	What you can bring	Who it's for	Price as published	Free option
Khanmigo	Never gives the answer; guides you	Typed or spoken questions; help on Khan Academy exercises and videos	Elementary to college; buyers 18+ in the US	$4/month or $44/year	Khan Academy library is free; Khanmigo is paid
Gemini (Guided Learning)	Breaks problems down step by step	Questions, uploaded course materials	Google Account holders; paid Google AI plans 18+	Free $0; AI Plus $4.99/month; AI Pro $19.99/month	Free plan
Quizlet	AI Homework Help: alternate methods, concept breakdowns	Notes, slides, PDFs	Students and teachers	Quizlet Plus price not shown	Some AI features free
Brainly	Explains, nudges or asks back; steps unlock in order	Homework uploads, questions	Grades 7 to 12; page written for parents	Not shown on the pages checked	7-day Brainly Plus trial for first-time users
Astra AI	Step by step, asks questions back, answer last	Photos, notes, slides, past papers	Middle school to university	Shown on the upgrade page	Free start, no card

Other tools you'll see in AI-tutor lists

Photomath solves math problems you scan or type and shows the steps, sometimes with more than one method, from elementary math through calculus. Its site lists a free Basic plan and paid plans at $9.99 a month or $69.99 a year (USD). Its page describes scan, solve and learn rather than a tutoring conversation, so treat it as a step-by-step explainer for math, not an all-subject AI tutor.

Best AI tutor by subject

Subject-specific picks have their own guides, so this table only points you to them.

Subject	Where to look
Math (by course and exam)	The best AI math tutor, or Astra AI for math
Chemistry	The best AI for chemistry
Physics and other sciences	No separate guide yet. Khanmigo and Astra AI both list sciences among their subjects
Several subjects plus a test date	Exam Prep builds a plan from your own notes

When a human tutor is the better pick

An AI tutor is there whenever you open it and doesn't mind the same question three times. What it can't do is hold you accountable the way a person can, and it can get a step wrong. A human tutor is the better pick when motivation is the problem, when written work needs a human reader, or when a younger child needs a person on the call.

• Wyzant is a marketplace: you check tutors' credentials and reviews, see whether they have had a background check, message them before booking, and pay after the lesson. Its Good Fit Guarantee covers the first hour if the fit is wrong.
• Preply offers a 25- or 50-minute trial lesson, then a subscription of 1 to 5 hours a week. If the trial disappoints, it says you can switch tutors for free or get a full refund. Its how-it-works page is written around language learning.
• Varsity Tutors offers private 1-on-1 tutoring, weekly live classes, and practice tests and diagnostics. Its homepage shows no prices.

A practical setup is one human session a week plus an AI tutor between sessions. Bring the mistakes you made with the AI to the human session, so the tutor spends time on what you actually got wrong. For what research says about the two, see traditional tutoring vs AI tutoring.

Where Astra AI fits

Astra AI is our product, so weigh this section accordingly. It fits when the main need is understanding and practice from your own class material: a step explained at your level, quizzes from your notes, and a plan to a test date through Exam Prep.

It doesn't fit when you need a person: a younger child who needs supervision, essays that need a human reader, or a student who won't study unless someone is waiting for them. The free plan limits tutoring, Astra AI Plus prices are on the upgrade page and vary by country, and like any AI tutor it can make mistakes, so check tricky answers against your textbook or teacher.

Try Exam Prep with your notes

How to test an AI tutor in one to two weeks

1. Write one goal you can check, such as "solve quadratic word problems without hints" or "explain photosynthesis in my own words."
2. Pick one or two AI tutors from the list and use them only on that week's real assignments.
3. After every session, do one fresh problem alone. If you can solve it without help, the AI taught you something; if you can't, it may have done too much of the work for you.
4. Decide at the end. Keep it if you hit the goal or are clearly closer and used it without being chased. Drop it if sessions felt useful but you still can't do the fresh problem, or if a paid plan costs more than your use justifies.