Gauth AI review (2026): pricing, accuracy and what users really think

Short answer first: Gauth AI is a homework helper app owned by ByteDance, the company behind TikTok, and yes, it's free to start. You snap a photo of a problem and it gives you a step-by-step solution. The free plan is capped at around 11 questions a day, and the paid Gauth Plus plan costs $11.99 a month or $99.99 a year in the US App Store. It's quick and good at high school math and science. It gets shakier on advanced problems, and billing is the thing unhappy users complain about most.

Quick confession before we go on. Nobody on our team ran Gauth through a hands-on test for this review, so I'm not going to tell you I timed it with a stopwatch at my kitchen table. What we did instead: we went through the official App Store listing, independent hands-on reviews (Cybernews did the most thorough one), app-store data and a stack of user reviews, all as of late October 2026. Whenever someone else did the testing, I'll name them.

And if you landed here after searching "goth ai", "guath ai", "gath ai" or "gauthmath ai", you're in the right place. Same app, lots of spellings.

What is Gauth AI?

Gauth (it used to be called Gauthmath) is an AI study app for iPhone, iPad and Android, with a web version and a browser extension too. Its official name in the App Store is "Gauth: AI Study Companion", and the developer is listed as GAUTHTECH PTE. LTD., a Singapore company. Implicator describes GauthTech as a ByteDance subsidiary started in 2020 by a former math teacher, and other 2026 reviews, such as Pasquale Pillitteri's, also name ByteDance as the owner.

It started out as a math photo-solver, which is why so many people still search for "gauth ai math" or "gauth math ai". These days it covers a lot more. The App Store listing mentions math, biology, physics and chemistry among its subjects, plus a writing assistant, an AI voice tutor and a study timer. Cybernews tried it on literature and social science questions as well, which we'll get to.

It's also huge. As of October 25, 2026, Chrome-Stats tracks the Android app at more than 130 million downloads on Google Play, with about 2.7 million new installs in the previous week alone. Back-to-school season clearly does wonders for it.

Key features

Photo solver with step-by-step answers

This is the core. You point your camera at a problem (printed or handwritten) and Gauth reads it and walks you through a solution. Handwriting is often where these apps fall apart, but Adam Koscielak at Cybernews said Gauth "never had any major trouble translating my writing into digital text", equations included. Not everyone has been so lucky: Dupple's review lists messy handwriting as a common failure point. My guess is it comes down to just how messy your handwriting is.

AI Live Tutor and follow-up questions

You can ask follow-ups after you get an answer, and there's a voice tutor as well. The App Store copy puts it this way: "Our AI Live Tutor is available anytime via voice." Reviewers who've written about it call the voice tutor Emma. It's one of the features that makes Gauth feel less like an answer key and more like a tutor. Not everyone loves it, though. One App Store reviewer said the human-sounding voice put them off and wrote, "I don't want to have to listen to some creepy fake AI person teaching me something." Fair enough.

Human experts

This is what sets Gauth apart from a general chatbot. The listing advertises 24/7 access to subject experts, and Cybernews says Plus subscribers get 24/7 human tutor access. The company has claimed it works with 50,000 verified tutors, but that's Gauth's own number and nobody we found has checked it. Some reviews talk about a separate, pricier tutor tier, which I'll cover in the pricing section.

Smart Study Converter, DeepThinking and the writing assistant

The newer features are aimed at studying, not just homework. The App Store listing describes a Smart Study Converter that turns your notes, audio or lecture links into quizzes and flashcards, a DeepThinking mode for harder problems, a writing assistant and a study timer. Ask the writing assistant for an essay, and it's careful about it. Cybernews asked for one and got an outline with explanations for each paragraph, not a finished essay. Honestly, I like that.

The Gauth AI extension

There's a Gauth AI extension for Chrome too, so you can ask about questions you find on a web page without picking up your phone. Pillitteri's review says the full Chrome extension needs a paid plan, so think of the extension as part of the Plus package rather than a free bonus.

Pricing and plans

Gauth's pricing gets confusing because the App Store lists so many introductory, trial and win-back offers. These are the standard US prices from the official App Store listing, checked October 2026:

Sources: subscription prices from the App Store listing, which warns that prices vary by region. Free-plan limits and Plus features from Cybernews.

Here's what the free plan actually gives you. About 11 questions a day is plenty for checking a single worksheet, but it won't get you through a whole problem set, and Cybernews says the free plan shows ads. The reviews disagree on this: Dupple and a few others call the free tier ad-free. A September 2026 Trustpilot reviewer, though, complained about ads before each answer. I'd go with the more recent first-hand reports and assume you'll see ads.

A few things to watch:

• The trial. There's a 3-day free trial, and the App Store lists trial versions of the quarterly ($31.99) and annual ($99.99) plans. Dupple says the trial needs a payment method and turns into a paid plan on day four. Put a reminder in your calendar.
• Special offers. The App Store also shows a discounted annual offer at $49.99 and a quarterly one at $26.99. Whether you see them seems to depend on the promotion and your account.
• The "tutor tier". Several reviews mention a plan of around $19.99 a month with live human tutors. It isn't in the App Store list we checked, and Cybernews includes tutor access in standard Plus, so treat that number as unconfirmed.
• Cancelling. If you subscribed through Apple or Google, cancel through your phone's subscription settings. Reviewers recommend this over the in-app flow, and you'll see why in the user section.

For context, Cybernews notes that US tutors often charge more than $40 an hour, so a year of Plus works out cheaper than a few tutoring sessions. That's a fair comparison as long as the answers are right, which brings us to the next part.

Performance and independent testing

Gauth advertises a 95% solve rate. Dupple, which reviews it favourably, says it has "not seen an independent peer-reviewed benchmark" backing that up, and we couldn't find one either. So I'm treating 95% as marketing until someone shows their work. (Fitting, for a math app.)

The most detailed hands-on test we found was the Cybernews review by Adam Koscielak, last updated February 2026, which gave Gauth 4.1 out of 5. Here's what happened in his tests:

• SAT math: he tried three hard practice questions from PrepScholar, and Gauth got all three right, with explanations. A separate SAT temperature question was also correct.
• Vague questions: when he gave it incomplete problems about travel time and falling objects, it "asked for clarification, rather than just guessing." More AI tools should do that.
• Humanities: its breakdown of Claudius's soliloquy in Hamlet "featured correct information". An answer about Poland's parliamentary system was correct but needed extra prompting to get detailed.
• Against ChatGPT and Gemini: all three solved a shirt-discount problem. Gauth just showed the calculation, while the other two asked guiding questions. Its explanation of why ice floats was the simplest of the three.
• Speed: answers came back almost instantly, even on complex tasks.

That's a good result for the high school level. Things change at the top end, though. Cybernews doesn't recommend Gauth above undergraduate level, Dupple lists advanced calculus, proofs, multivariable graphing and 3D geometry as weak spots, and Pillitteri reports errors on advanced calculus and graph-drawing tasks.

The sneakiest problem is what Dupple calls "silent intermediate errors": the final answer is right, but one of the steps along the way is wrong. If you're copying the steps to learn the method, that's exactly the kind of mistake that bites you on the exam. Dupple also says Gauth "often returns generic responses or wrong answers without flagging uncertainty" on the hardest topics.

Users notice too. On Trustpilot, people describe answers that contradict each other, one says they spent 20 minutes in a chat that kept giving wrong answers, and another says the app "REFUSES to change its answer" even after being corrected. One student who relied on it for exam prep wrote: "I actually failed because of it." That's a small, negative-leaning sample, but the pattern matches what the reviewers found.

My read: Gauth is fast and usually right on standard algebra, geometry, SAT-style and intro science questions. Check its work on anything harder, and never take a step on trust just because the final number matches.

Privacy and school rules

Two more things before you hand this to a teenager. The App Store privacy label lists contact info, user content, identifiers, usage data and diagnostics as data linked to you, and identifiers may be used to track you across other companies' apps and sites. ByteDance ownership is a concern for some families and schools as well. Pillitteri notes that some US schools have blocked the app, and Cybernews counts school-wide bans among the cons. On academic integrity: check your school's rules before using any homework app on graded work. Gauth is most useful when you've already tried the problem yourself and want to see where you went wrong.

Who it's for

Middle and high school students who want a quick explanation of a math or science problem they're stuck on, especially with a camera-first app. Early college students doing intro STEM courses. Parents who've forgotten how long division works and want to help without guessing. Two of the positive Trustpilot reviews come from students using it alongside Sparx maths homework.

Who should skip it? Anyone working on advanced university math, anyone who needs essays written (it won't do that, and it shouldn't), and families who aren't comfortable with the data collection. If you only need a few answers a day, stay on the free plan. If you're looking at a broader set of options, our roundup of free AI tools for students is a good place to start.

Gauth AI alternatives worth considering

• Photomath: a math-only photo solver, owned by Google since 2022. Dupple recommends it if you only need math. See our guide to math AI tools for more options.
• Symbolab or Wolfram Alpha: better choices for advanced calculus and heavy symbolic math, which is where Gauth struggles. Dupple points advanced calculus students to Symbolab, and Pillitteri suggests Wolfram Alpha.
• ChatGPT: a general assistant with a study mode. Cybernews found it can match Gauth's teaching quality, it just doesn't come with human tutors. Our ChatGPT GPT-6 review covers the plans.

If you're a teacher rather than a student, the tool you want is probably MagicSchool AI, which is built for lesson planning, not homework answers.

Verdict

Gauth AI is fast, easy to use and genuinely helpful for the kind of homework most teenagers actually get. The photo solver works, the explanations are clear, the human tutor option is something general chatbots don't have, and Plus at $99.99 a year costs less than a couple of hours with a private tutor. Independent testers liked it: Cybernews gave it 4.1 out of 5, and Pillitteri gave it 4 out of 5. The app stores love it even more, rating it 4.8 on both iOS and Android.

I've marked it down to 3.5 for three reasons. Accuracy drops on advanced problems and it doesn't always warn you. Trustpilot is full of billing and cancellation horror stories. And the data collection is broad for an app aimed at kids. Use it if you're a high school or early college student who wants to check your work and understand the method. Skip it if you're doing advanced math, or if a ByteDance-owned app collecting data linked to your child is a dealbreaker for your family.

Either way, keep thinking for yourself. These apps work best when you use them like a tutor, not a copy machine.

FAQ

Is Gauth AI free?

Yes, Gauth AI is free to download and use, with a cap of about 11 questions a day and ads, according to Cybernews. Unlimited answers, no ads and access to human tutors require Gauth Plus, which costs $11.99 a month, $31.99 a quarter or $99.99 a year in the US App Store as of October 2026. A 3-day free trial is available, but it turns into a paid plan if you don't cancel.

Who owns Gauth AI?

The app is published by GauthTech Pte. Ltd., a Singapore company that multiple reports describe as a ByteDance subsidiary. ByteDance also owns TikTok.

Is Gauth AI accurate?

Mostly on standard problems. Cybernews found it answered hard SAT math questions correctly, but reviewers report errors on advanced calculus, proofs and graphing, sometimes with the right final answer and a wrong step along the way. Its 95% solve-rate claim hasn't been independently verified.

Does Gauth AI have a Chrome extension?

Yes. There's a Gauth AI extension for Chrome, and reviewers say the full version needs a paid plan.

Is Gauth AI safe for kids?

The App Store rates it 4+, but the privacy label lists contact info, user content, identifiers and usage data as linked to you, and some schools block it. Parents should read the privacy policy and check school rules before use.