Table of Contents
- Why people look past Gauth in the first place
- Quick comparison: all five alternatives at a glance
- Feature checklist: what each tool can and cannot do
- Subject coverage: where each one stops
- The 5 Best Gauth AI Alternatives
- Pricing head-to-head: what a year actually costs
- Which Gauth alternative should you actually pick?
- Four habits that make any of these tools work better
- Final verdict after two months of switching between them
I have had Gauth on my phone for the better part of two years. It started as Gauthmath, a plain photo solver for algebra, and it has grown into something that will tackle chemistry equations, essay feedback, and a physics diagram in the same session. For a lot of students it is the first app they open when they are stuck.
So why write about alternatives? Because a few things kept nagging at me during long study sessions. The free plan gives you roughly eleven questions a day, and the follow-up chat that actually helps you understand a step is locked behind Gauth Plus. That plan runs $11.99 a month in the US, $31.99 a quarter, or $99.99 a year. The three-day trial asks for a card up front and converts automatically. And on harder college material, I caught it confidently walking through a wrong answer more than once.
None of that makes Gauth bad. It makes it one option among several. Over the past couple of months I put five of the others through the same set of problems. Two of them, Question AI and Doctrina AI, were already on my radar. The rest are the ones students keep recommending to each other. Here is what held up.
Why people look past Gauth in the first place
The four complaints that come up most • The free tier caps you at about 11 questions per day, which disappears fast during exam week. • Follow-up questions (the useful part) require Gauth Plus. • The trial requires payment details and auto-converts on day four. A chunk of the one-star reviews are about that. • Accuracy is strong on standard K-12 and early college work but slips on proofs, multi-step engineering problems, and messy diagrams. |
Quick comparison: all five alternatives at a glance
| Tool | Best for | Subjects | Free tier | Paid price (US) |
|---|---|---|---|---|
| Photomath | Fast, reliable math scans | Math only | Unlimited basic steps | $9.99/mo or $69.99/yr |
| Microsoft Math Solver | Free step-by-step math with zero paywall | Math only | Everything | Free |
| Question AI | Multi-subject homework and PDF questions | Math, science, humanities | Full solver with ads | About $9/mo, cheaper yearly |
| Khanmigo | Learning the method, not copying the answer | K-12 math, science, reading, coding | None (paid only) | $4/mo or $44/yr |
| Doctrina AI | Exam prep and self-made practice tests | Any text-based subject | Quizzes and essays | $10 one-time |
Feature checklist: what each tool can and cannot do
Yes and no answers, checked in September 2026. Where a feature is paid-only, it says so.
| Feature | Gauth | Photomath | MS Math Solver | Question AI | Khanmigo | Doctrina AI |
|---|---|---|---|---|---|---|
| Photo scan | Yes | Yes | Yes | Yes | Yes | No |
| Full steps on free plan | Limited | Yes | Yes | Yes | N/A | N/A |
| Follow-up chat | Paid | No | No | Yes | Yes | Paid |
| Human tutor | Paid | No | No | No | No | No |
| Practice or quiz maker | No | No | Similar problems | Test prep | Yes | Yes |
| PDF questions | No | No | No | Yes | No | Upload |
| Desktop or web | Yes | No | Yes | Yes | Yes | Yes |
| Works offline | No | Yes | No | No | No | No |
Subject coverage: where each one stops
| Tool | Math | Chemistry | Physics | Biology | Humanities and writing | Standardized test prep |
|---|---|---|---|---|---|---|
| Gauth | Yes | Yes | Yes | Yes | Yes | No |
| Photomath | Yes | No | No | No | No | No |
| MS Math Solver | Yes | No | No | No | No | No |
| Question AI | Yes | Yes | Yes | Yes | Yes | SAT, ACT, GRE, GMAT, MCAT, LSAT |
| Khanmigo | K-12 | K-12 | K-12 | K-12 | Reading and writing | SAT |
| Doctrina AI | Text only | Yes | Yes | Yes | Yes | Self-made mock exams |
The 5 Best Gauth AI Alternatives
Photomath: the cleanest math scanner I have used
Photomath has been around since 2014 and Google finished acquiring it in 2023. The core loop is unchanged: point the camera at a problem and it solves it with steps. What surprised me is how little the free tier holds back. Basic steps are unlimited and you do not even need an account.
| Detail | What you get |
|---|---|
| Best for | Middle school through early college math when you want the scan to just work |
| Price | Free for basic steps. Photomath Plus is $9.99/month or $69.99/year with a 7-day trial |
| Platforms | iOS and Android only. No desktop site |
| Subjects | Arithmetic, algebra, geometry, trigonometry, calculus, statistics, word problems |
Where it beats Gauth • The OCR reads my handwriting more consistently than Gauth's, especially fractions and exponents. • Free plan is more generous. No daily question cap. • Plus adds animated walkthroughs and textbook-matched solutions, which is a different kind of value than a human tutor. | Where it falls short • Math only. Bring a chemistry question and it has nothing for you. • No conversational follow-up. It shows steps but you cannot ask it why a step is legal. |
Real scenario: A friend who tutors ninth graders keeps Photomath on her phone to check a student's arithmetic quickly, then explains the concept herself. That division of labor is where it shines.
Microsoft Math Solver: the free one that does not feel free
This is the app I recommend to anyone who cannot spend money on study tools. Microsoft Math Solver gives you full step-by-step solutions, graphs, and linked video explanations, and it charges nothing. There is no premium tier to upsell you into.
| Detail | What you get |
|---|---|
| Best for | Students on a zero budget, or anyone who wants a second opinion on a Gauth answer |
| Price | Free. No ads on the steps, no daily cap |
| Platforms | Web (math.microsoft.com), iOS, Android, and built into Microsoft Edge |
| Subjects | Math only: arithmetic through calculus and basic statistics |
Where it beats Gauth • Free with full steps. Gauth's free plan does not come close. • The graphing view is helpful for functions and inequalities. | Where it falls short • Camera recognition is a step behind Photomath on messy handwriting. • No chat, no tutor, no follow-up questions. • Explanations are correct but terse. It shows the step, not the reasoning behind it. |
How I use it: As a verifier. When Gauth gives me an answer that feels off, I type the problem into Math Solver. If they disagree, I open the textbook. That habit has caught more than one wrong answer.
Question AI: the closest like-for-like Gauth replacement
Of everything here, Question AI most resembles Gauth in shape. Snap a photo, get steps, ask follow-ups in chat, across math, science, English, and history. Sensor Tower ranked it the top education app in its mid-2024 AI downloads report, and it has kept adding features since, including a PDF reader and a test-prep section called TestAce.
| Detail | What you get |
|---|---|
| Best for | High school and early college students who want one app for every subject |
| Price | Free with ads, including the full solver. Premium removes ads and speeds up responses, starting around $9/month, cheaper yearly |
| Platforms | Web, iOS, Android |
| Subjects | Math, chemistry, biology, physics, literature, history, language questions |
| Standout feature | Upload a textbook chapter as a PDF and ask questions about it directly |
Where it beats Gauth • The free plan is the most generous multi-subject option I tested. Gauth's free tier caps daily questions; Question AI mostly does not. • PDF questions are built in rather than bolted on. Great for reading assignments. • TestAce covers SAT, ACT, GRE, GMAT, MCAT, and LSAT prep in the same app. | Where it falls short • Accuracy on harder college problems is noticeably weaker than Gauth. I saw it confidently miss two of the ten calculus questions. • Photo quality matters a lot. Blurry scans produce wrong readings, though it does repeat the question so you can check. • No human tutor fallback, which is Gauth's biggest unique feature. |
Verdict for this one: If your main complaint about Gauth is the daily cap and the paywalled chat, Question AI solves both. If your complaint is accuracy on advanced work, it will not.
Khanmigo: the one that refuses to just hand you the answer
Khanmigo is Khan Academy's AI tutor, built on a different philosophy from everything else here. It will not give you the final answer. It asks what you have tried, nudges you toward the next step, and waits. The first time I used it I found that irritating. By the third session I was retaining the method instead of the answer.
| Detail | What you get |
|---|---|
| Best for | Parents, and students who want to actually learn the material rather than finish the worksheet |
| Price | $4/month or $44/year. One parent subscription covers up to 10 child accounts. Free for eligible US teachers |
| Platforms | Web and the Khan Academy mobile apps |
| Subjects | K-12 math, science, reading and writing, coding, plus SAT prep tied to Khan Academy's library |
| Limitations | Consumer subscriptions currently require a US billing address |
Where it beats Gauth • Cheapest paid option on this list by a wide margin. • Every exercise, video, and article on Khan Academy has the tutor attached to it. • Strict content filters and nonprofit ownership. Parents I know trust it more than any other app here. | Where it falls short • If you need an answer in the next ninety seconds, this is the wrong tool. • Scope stops at K-12 and early college. Advanced university coursework is not supported. • No free tier at all, unlike Gauth. |
Who should pick this over Gauth: Anyone whose grades are the goal rather than the homework. It is slower in the moment and faster over a semester.
Doctrina AI: not a solver, but the best exam-prep companion here
Doctrina AI does not scan problems. It generates exams, quizzes, and improved class notes from a topic or a document you upload. I include it because the week before a test, writing yourself a mock exam beats solving one more homework set, and Gauth offers nothing like it.
| Detail | What you get |
|---|---|
| Best for | Building practice tests, turning messy notes into study material, and teachers writing quizzes |
| Price | Free tier includes the quiz and essay tools. Full access (exam generator, AI chat, note enrichment) is a one-time $10 payment with no subscription |
| Platforms | Web |
| Subjects | Any text-based subject. It works from your input, not a fixed curriculum |
Where it beats Gauth • One-time $10 versus a monthly bill. Over a year it costs less than a single month of Gauth Plus. • Fills the gap Gauth leaves: practice testing rather than homework solving. | Where it falls short • No photo solver. It will not help you with tonight's problem set. • Generated questions occasionally repeat or drift off topic. Review them before you rely on them. |
Pricing head-to-head: what a year actually costs
Monthly prices look similar across most of these apps. The annual plans are where the gap opens up, and the free tier decides whether you need to pay at all.
| Tool | Monthly | Annual | Cost per month on annual | Free trial | What the free tier holds back |
|---|---|---|---|---|---|
| Gauth Plus | $11.99 | $99.99 | $8.33 | 3 days, card required | Daily cap of about 11 questions, no follow-up chat |
| Photomath Plus | $9.99 | $69.99 | $5.83 | 7 days | Animated tutorials and textbook solutions |
| Microsoft Math Solver | Free | Free | $0 | N/A | Nothing |
| Question AI Premium | About $9 | Lower, varies | Varies | Free plan instead | Ads and response speed only |
| Khanmigo | $4 | $44 | $3.67 | None | No free tier |
| Doctrina AI Premium | $10 one-time | $10 one-time | About $0.83 in year one | Free plan instead | Exam generator, chat, note enrichment |
The takeaway: Over a full year, Gauth Plus costs more than twice Khanmigo, about 30 dollars more than Photomath Plus, and ten Doctrina licenses. The only thing that justifies the gap is the human tutor fallback and the breadth of subjects.
Which Gauth alternative should you actually pick?
Match the tool to the specific thing that pushed you away from Gauth. That is more useful than any overall ranking.
| If your situation is | Go with | Because |
|---|---|---|
| I hit the daily cap and cannot pay monthly | Microsoft Math Solver or Question AI | Both give full steps for free, one for math and one for all subjects |
| I only ever need math, and the scan has to be reliable | Photomath | Best camera recognition and unlimited free basic steps |
| I want my kid to learn, not copy | Khanmigo | Socratic approach, $4 a month, covers up to 10 children |
| I just need to check an answer quickly | Microsoft Math Solver | Instant, free, and no account needed |
| I have an exam in a week | Doctrina AI | Generate and grade your own mock exams for a one-time $10 |
| I need a human when the AI is wrong | Stay with Gauth | Its live tutor fallback is still unique in this group |
Four habits that make any of these tools work better
What I wish someone had told me earlier • Crop tightly. Every scanner on this list gets confused by neighboring problems. One problem per photo. • Cross-check anything that matters. Two tools agreeing is not proof, but two tools disagreeing is a signal to open the textbook. • Cover the answer and redo the problem. If you cannot reproduce the steps without the app, you have not learned it yet. • Set a cancellation reminder the day you subscribe. Almost every billing complaint I read about these apps involved a forgotten renewal. |
Final verdict after two months of switching between them
I expected to finish with a single winner and I did not. I ended up with a small toolkit. Photomath lives on my phone for anything with a camera. Microsoft Math Solver stays open in a browser tab as the free second opinion. When I am studying rather than solving, Khanmigo is the one that changed how I approach a problem, and at $4 a month it is the easiest recommendation on this page.
Question AI came closest to replacing Gauth outright. It does the same job, its free tier is kinder, and the PDF feature is one I now use weekly. Where it lost ground was on the hard stuff, and that is exactly where Gauth's human tutor option earns its price for students in AP or honors courses.
So here is my advice. If Gauth's cost or daily limit is the problem, switch. If accuracy on advanced material is the problem, no app here fixes it completely, and Gauth's tutor fallback is still the strongest safety net. Try the free tiers, run them on your own hardest problems for a week, and pay only for the one you kept coming back to.
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