Math homework has a way of turning a good evening into a frustrating one. You followed the lesson, you think you understand the steps, and then exercise 14 just doesn't click. A good math homework helper changes that. Not by doing the work for you, but by showing you where your reasoning breaks down and how to fix it.
AI math apps have made serious progress. Scanning a photo and getting a step-by-step solution used to feel like magic. Now it's standard. The real question is which app actually helps you understand the concept, so you can handle similar problems on tomorrow's test without any help at all.
This guide compares the three best AI math homework helpers available in 2026: Photomath, Gauth, and Acuity. We've looked at scanning accuracy, explanation depth, subject coverage, and whether each app builds real understanding or just helps you finish math drills faster.
What makes a great math homework helper?
Before getting into specific apps, it's worth pinning down what actually matters. There are a lot of math tools out there, and most of them share the same basic features. The differences show up in the details.
Here's what separates a genuinely useful math homework helper from a glorified answer machine:
- Scan accuracy: can it read handwritten notes, printed textbooks, and math worksheets reliably, including symbols, fractions, and exponents?
- Step-by-step explanations: does it walk you through the method with the rule applied at each step, or just show a result?
- Subject depth: does it handle algebra, geometry, trigonometry, calculus, and statistics, or only the basics?
- Learning reinforcement: does it help you retain the concept, or just get you past tonight's math aids?
- Usability on mobile: is the interface fast and easy to use during a real homework session?
- Free tier value: can you use it meaningfully without paying immediately?
Keep those criteria in mind as we go through each app.
Photomath: the scanner that set the standard
Photomath launched in 2014 and was, for a long time, the only serious option for photo-based math solving. That history counts for something: the scanning is fast, the interface is clean, and the step-by-step solutions cover a wide range of topics. Ten years of refinement shows.
Point your camera at a printed exercise or handwritten equation and Photomath returns the solution in seconds. For algebra and introductory calculus, the explanations are genuinely useful: each step is labeled with the rule being applied, which helps you understand what's happening rather than just copying the result. The animated solution mode, available on the paid plan, is particularly good for visual learners who need to see each transformation.
Where Photomath shines
Core math: arithmetic, fractions, algebra, geometry, trigonometry, statistics, and introductory calculus. These topics are handled with precision and the explanations are well-phrased. If your homework is a page of standard algebra exercises or a geometry proof, Photomath handles it as well as anything out there.
The word problem solving has also improved significantly. Photomath can parse many standard math lessons word problems that used to trip up earlier versions.
Where it shows its limits
Photomath is math-only. If your homework is a physics problem that involves equations, you'll get help with the calculation part but not the conceptual physics. The AI tutor chat, added more recently, works but feels like an addition to a product built around scanning rather than a native feature. And advanced university-level topics get thinner explanations.
The free tier covers basic scanning and solutions. Detailed explanations, animated steps, and harder problem support sit behind Photomath Plus, which runs around $10 per month.
Best for: students who mainly need a reliable scanner for school-level math and want polished, clean explanations.
Gauth: multi-subject AI with strong math coverage
Gauth (formerly Gauthmath) has evolved beyond pure math. It still handles equations and scanning extremely well, but it has added support for physics, chemistry, and biology. For students juggling math alongside science coursework, that matters.
The step-by-step breakdowns in Gauth are detailed. It tends to show intermediate calculations that other apps sometimes skip, which is helpful when you're working through an unfamiliar method. The AI chat answers follow-up questions reasonably well; you can ask why a specific step was taken and get a coherent explanation rather than a boilerplate response.
The free tier reality
Gauth's free tier runs on a daily points system. You get a fixed number of questions before hitting a wall, which is frustrating mid-session when you're in the middle of a set of math drills. Premium removes the limit and unlocks full AI chat. The pricing is competitive, but Gauth is not meaningfully free for students who use it every day.
Coverage across math is strong: algebra, geometry, trigonometry, calculus, and statistics are all supported. The scan accuracy is on par with Photomath for printed text and handles most handwriting well. Where Gauth pulls ahead is the multi-subject angle: you can scan a chemistry equation or a physics problem involving vectors and get a coherent explanation, not just a blank result.
Limitations worth knowing
The user interface is functional but busier than Photomath. Some students find the points system discouraging during long study sessions. And while the multi-subject coverage is useful, it's not as deep on science topics as it is on core math.
Best for: students covering math alongside science subjects who want one app for multiple courses.
Acuity: the AI math homework helper that tests you back
Acuity takes a different angle on the math homework problem. Yes, it scans exercises and returns step-by-step solutions, with accuracy on par with Photomath for standard school-level topics. But the core differentiator is what happens after the solution.
Once you've worked through an explanation, Acuity generates targeted quiz questions on that specific concept to check whether you actually understood it or just read through the steps. This distinction matters more than it might seem.
Why active recall beats passive reading
Cognitive science research consistently shows that active recall is roughly twice as effective as passive re-reading for long-term retention. Reading a step-by-step solution is passive. Answering a question about the method you just read is active. Acuity builds that loop directly into the homework workflow, which means the time you spend on math lessons tonight actually transfers to what you can do on Friday's test.
Most math aids and scanners stop at the solution. Acuity pushes one step further and checks whether the explanation actually landed.
Coverage beyond math
Acuity isn't math-only. You can scan notes from any subject, get AI-generated summaries, create flashcard sets, and run practice quizzes across every course. If you're studying history, literature, biology, and math in the same evening, Acuity handles all of it from one app. That makes it the most versatile option here for students balancing a full course load.
We built Acuity because most existing apps either gave you answers without explanation (useful short-term, bad for exams) or required you to manually build all your study content from scratch (time-consuming and easy to skip). The scan-explain-quiz loop was designed to close that gap without adding extra steps to the workflow.
Honest limitations
Acuity is iOS-only. If you're on Android, it's not an option yet. The free tier is functional for daily use, and premium unlocks higher usage limits and advanced features.
Best for: students who want to retain what they learn, not just finish the worksheet, and who study multiple subjects from one app.
Head-to-head: math homework helper comparison
| Feature | Photomath | Gauth | Acuity |
|---|---|---|---|
| Photo scanning (math) | ✅ | ✅ | ✅ |
| Step-by-step solutions | ✅ | ✅ | ✅ |
| AI tutor chat | ⚠️ Limited (paid) | ✅ | ✅ |
| Multi-subject support | ➖ Math only | ➖ Math & science | ✅ All subjects |
| Active recall quizzes | ❌ | ❌ | ✅ |
| Note summarization | ❌ | ❌ | ✅ |
| Flashcard generation | ❌ | ❌ | ✅ |
| Usable free tier | ⚠️ Partial | ⚠️ Points-limited | ✅ |
| Platform | iOS, Android | iOS, Android | iOS only |
Which math topics do these apps actually cover?
For core school math, all three apps handle the essentials: arithmetic, fractions, algebra, geometry, trigonometry, and introductory calculus. This covers the vast majority of what students need for secondary school math homework.
If you're wondering about a specific math symbol or notation (what does sigma mean, how to read set notation), all three apps will explain it. Where they diverge is depth. Photomath explains each step. Gauth explains the method and often shows intermediate calculations. Acuity explains the method and then checks whether you can apply it to a new problem.
Harder and more advanced topics
For upper-secondary content like calculus, limits, differential equations, and linear algebra, results get more variable across all three apps. None of them is a perfect replacement for a human tutor at the university level. That said, Acuity and Gauth handle a wider range of upper-secondary topics reliably; Photomath starts to get thinner on detailed explanations for these areas.
Word problems and applied math
Word problems that involve setting up equations from a written scenario are handled differently by each app. Photomath has improved significantly here. Gauth handles standard applied math well. Acuity will solve the math and, importantly, quiz you on the method used, which helps with the class of problems that show up in slightly different forms on exams.
How to use an AI math homework helper without shortchanging yourself
This part matters. Every one of these apps can be used as a shortcut or as a learning tool. The difference comes down to how you use them.
The shortcut approach: scan the exercise, copy the final answer, move on. Result: you get through the worksheet but learn nothing. Next week's test goes badly.
The learning approach is only slightly slower:
- Try the problem yourself first, even if you only get a step or two before getting stuck.
- Scan and read the step-by-step explanation carefully. Every step, not just the last line.
- Identify the specific step where your reasoning went wrong. That's the actual gap.
- Close the app and attempt a similar problem from the same math lessons section from memory.
- If your app supports it, take the follow-up quiz on that concept before moving to the next exercise.
This workflow turns a math homework session into genuine study time. It takes maybe 20% longer per problem and dramatically changes what you retain by the end of the week.
The bottom line
All three apps are genuinely useful, and none of them is a bad choice. Photomath is the most polished pure math scanner and still the go-to for students who need fast, clean solutions to school-level algebra and geometry. Gauth covers more ground if you also need physics and chemistry in the same session. Acuity goes further by building active recall into the workflow: you get the math explanation plus a quiz on the concept, plus coverage of every other subject you're studying.
If you're on iOS and want a math homework helper that helps you actually prepare for tests rather than just finish worksheets, try Acuity. The free tier covers daily use and the quiz feature is the part most students say they didn't know they needed until they tried it. Download Acuity on the App Store and scan your next exercise to see how it works.