Gauth

Gauth: ByteDance's Answer to Homework Across Every Subject

Gauth launched in 2020 as Gauthmath, a photo-based math solver, and has since widened into a general AI homework helper covering math, physics, chemistry, biology, and writing. The core loop is unchanged: snap a photo of the problem, and Gauth returns a solution with step-by-step reasoning in seconds. For questions the AI finds ambiguous, the app has historically backed its AI with human tutors — a hybrid that set it apart from pure camera-solver apps.

What makes Gauth notable is who builds it: ByteDance, the company behind TikTok. That pedigree shows in the product's distribution — Gauth has climbed to the top of US education app download charts, and in late 2025 held the #1 education download spot for days at a stretch, trailing only Duolingo among education apps overall. The app is free for core solving with ads; Gauth Plus (around $11.99/month, with cheaper quarterly and annual plans) removes ads and unlocks unlimited questions and faster answers.

Key Features

• Photo-based problem solving with step-by-step explanations
• Coverage beyond math: physics, chemistry, biology, and essay/writing help
• Fast solve times, typically returning worked solutions in seconds
• Writing assistant for outlining, drafting, and improving essays
• Free core tier with ads; Gauth Plus for unlimited questions and no ads
• iOS, Android, and web apps with a browser extension

Ideal Use Case

Gauth fits middle and high school students who want one app for all homework rather than a math-only solver — the same photo flow works on a chemistry equation, a biology diagram question, or an essay prompt. Strugglers get the full reasoning chain, not just the final answer, which makes it usable as a self-teaching tool.

How Gauth differentiates

Gauth is owned by ByteDance, TikTok's parent company, and its site has claimed more than 200 million students supported. Forbes and Axios both covered its surge up the US app charts, and in Q3 2025 it held the #1 spot for US education app downloads for six consecutive days. Multi-subject coverage — science and writing, not just math — separates it from camera solvers like Photomath.

FAQ

Is Gauth free? Core photo-solving is free with ads and daily limits. Gauth Plus, at roughly $11.99/month with discounted quarterly and annual options, removes ads and unlocks unlimited questions.

How is Gauth different from Photomath? Photomath is math-only and goes deeper on animated math instruction; Gauth covers science and writing too and leans on fast AI answers across subjects.

How accurate is Gauth? Strong on standard math and science problems; like all AI solvers it can stumble on ambiguous wording or multi-part questions, so treat the steps as something to verify, not gospel.

Who owns Gauth, and what about my data? Gauth is owned by ByteDance, TikTok's parent — worth knowing if data jurisdiction matters to you. Review its privacy policy for what's collected; schools in some districts restrict ByteDance apps.

tl;dr

Gauth is ByteDance's AI homework helper: photograph a problem in math, science, or writing and get step-by-step solutions in seconds. Free with ads; Plus (~$11.99/mo) unlocks unlimited questions. One of the most-downloaded US education apps, with 200M+ students claimed.

Related

Looking for more options? Browse the Education & Learning directory or read our best AI education tools listicle. Gauth is also tracked on Crunchbase.