Comparison 2026
FastSolve vs Gauth AI
Gauth AI explains a photo you snap. FastSolve solves the question already on your screen — invisibly.
Updated September 2026
Solves Inside Your LMS
FastSolve detects the question on Canvas, Blackboard, or Moodle and fills the answer in place. Gauth reads a photo or screenshot and shows the solution in its own window.
Invisible on Screenshare
Zero visual footprint — no panel, no popup. Gauth's answers appear in a visible app or extension panel that screenshare and webcams can see.
All Question Types
Multiple choice, fill-in-the-blank, essays, matching — auto-formatted for each LMS input. Gauth outputs an explanation you retype yourself.
No Phone, No Cropping
One double-click on the question — no snapping a photo, no cropping a screenshot, no switching devices mid-quiz.
Built for Timed Quizzes
Most answers land in under 2 seconds, filled into the right field, while the quiz timer is running.
Free to Try
10 solves a day free, no credit card. Gauth's free tier is similar — the difference is what each does with the answer.
Side by Side
Feature Comparison: FastSolve vs Gauth AI
| Feature | FastSolve | Gauth AI |
|---|---|---|
Auto-Fill Inside LMS Answer populates the Canvas, Blackboard, Moodle input field | Yes | No |
Question Capture How the tool reads the question | Auto-detect on page | Photo / manual crop |
Invisible Mode Undetectable on screenshare and screen recordings | Yes | No |
Image & Diagram Questions Solves questions that include figures or graphs | Yes | Yes |
Step-by-Step Explanations Teaches the working, not just the answer | No | Yes |
Human Tutor Backup Escalates hard problems to human tutors | No | Yes |
Mobile App iOS / Android app for phone use | No | Yes |
Response Time Time from question to usable answer | < 2 seconds | Seconds per scan |
Free Tier Use without paying | 10 solves/day | ~11 questions/day |
Pro Pricing Cheapest paid entry point | From $9.99/week | ~$11.99/month |
Deep Dive
Why FastSolve is the Best Gauth AI Alternative
What Gauth AI Actually Is
Gauth AI is ByteDance's homework-help app, launched in 2020 as Gauthmath, a photo-based math solver, and since expanded to physics, chemistry, biology, and writing. You snap or crop a picture of a problem and it returns a step-by-step solution; historically it has backed the AI with human tutors on ambiguous questions. It runs as an iOS/Android app, a website, and a Chrome extension that captures screenshots of webpages and PDFs into a chat panel.
Two Different Workflows: Snap-and-Read vs Detect-and-Fill
With Gauth, the loop is: capture the question (phone camera or extension crop), read the solution in Gauth's own window, then type the answer back into your quiz yourself. FastSolve collapses that loop — it detects the question already on your Canvas, Blackboard, or Moodle page, solves it with Claude and GPT-4o, and fills the answer into the correct input field on a double-click. No retyping, no second window, no device switching.
During a Proctored Quiz
This is where the products genuinely diverge. Picking up a phone to scan your screen is visible on webcam, and Gauth's extension shows its answers in an on-screen panel that appears in any screenshare or recording. FastSolve's invisible mode has no overlays and no popups — it is invisible, even over screenshare. Note the shared limit: inside a locked-down environment like Respondus LockDown Browser, all Chrome extensions are disabled, Gauth's and FastSolve's alike.
Gauth AI Pricing vs FastSolve Pricing
Gauth's free tier allows roughly 11 questions a day with ads; Gauth Plus (unlimited questions, faster processing, tutor access) runs about $11.99/month, $31.99/quarter, or $99.99/year, with prices varying by region and platform. FastSolve is free for 10 solves a day with no credit card, then $9.99/week, $19.99/month, or $99/year. The weekly plan is the practical difference: you can pay for exactly the week of finals instead of a monthly app subscription.
Where Gauth AI Genuinely Wins
Gauth is one of the most popular homework apps in the world, and it earns that on the learning side: step-by-step worked solutions that teach the method, human tutor escalation, and a polished mobile app for doing paper homework from a phone. FastSolve does none of that — it returns the answer, not a lesson. If you want to understand the working on your commute, Gauth is the better tool; if you need the answer placed into a live browser quiz, that is what FastSolve is built for.
Which Is Right for You?
Gauth AI vs FastSolve: Who Should Choose What?
Choose FastSolve If:
- You take graded quizzes in a browser on Canvas, Blackboard, Moodle, or another supported LMS
- You want the answer filled into the input field, not shown in a separate window to retype
- You need zero visual footprint during screenshare or proctored sessions
- You want week-sized pricing — $9.99 for finals week instead of a rolling app subscription
- You work on a desktop and don't want to involve your phone
Choose Gauth AI If:
- You want step-by-step explanations that teach the method, not just the answer
- You do homework from a phone and want a camera-first mobile app
- You want human tutor backup on ambiguous problems
- Your work is on paper or in a PDF rather than inside an LMS
FAQ
Frequently Asked Questions: FastSolve vs Gauth AI
Gauth AI is a homework-help app from ByteDance, TikTok's parent company. It launched in 2020 as Gauthmath, a photo-scan math solver, and now covers physics, chemistry, biology, and writing as well. You take a picture of a problem — or crop it with its Chrome extension — and it returns a step-by-step solution, with human tutors historically backing the AI on hard questions.
There's nothing to solve on gauthmath.com — Gauth is itself a solver, not a learning platform with quizzes. FastSolve works inside the platforms where your graded questions actually live: Canvas, Blackboard, Moodle, Brightspace, ALEKS, Schoology, Knewton, Learnosity, and DeltaMath. The real comparison is which tool you reach for when a question is on your screen.
Only indirectly. Gauth's Chrome extension can capture a screenshot of a Canvas or Blackboard question, but it shows the solution in its own visible panel and you still type the answer in yourself. It doesn't detect question types, doesn't fill inputs, and has no invisible mode. FastSolve does all three natively on its supported platforms.
Partly. Gauth's free tier allows roughly 11 questions a day; Gauth Plus removes the limit and adds tutor access for about $11.99/month, $31.99/quarter, or $99.99/year (regional prices vary). FastSolve's free tier is 10 solves a day with no credit card, and Pro is $9.99/week, $19.99/month, or $99/year.
Gauth doesn't publish an accuracy figure. It is strongest at math — its original specialty — and has historically escalated ambiguous problems to human tutors, which helps on genuinely hard questions but takes longer. FastSolve advertises 98% accuracy on supported question types, generating each answer fresh with Claude and GPT-4o in under 2 seconds.
It depends where your work lives. For paper homework, PDFs, and learning the method step by step from your phone, Gauth AI is the better fit. For browser-based quizzes and homework on Canvas, Blackboard, Moodle, ALEKS, or DeltaMath — where speed, auto-fill, and staying invisible on screenshare matter — FastSolve was built for exactly that job.
Use FastSolve on your LMS
DeltaMath
Solve DeltaMath questions in 2s
ALEKS
Solve ALEKS questions in 2s
Canvas
Solve Canvas questions in 2s
More comparisons
FastSolve vs Photomath
Photomath solves math with your camera. FastSolve solves every subject inside your LMS.
FastSolve vs Socratic by Google
Socratic explains concepts. FastSolve answers your LMS questions instantly and invisibly.
FastSolve vs ChatGPT
ChatGPT is powerful — but it wasn't built for LMS exams. FastSolve was.
More reading
Best AI Quiz Solvers, Ranked (2026)
Eight AI quiz and homework tools, ranked by what each is genuinely best at — and where each falls short for live LMS quizzes.
How AI Homework Helpers Actually Work (Models, Latency, Accuracy)
Most explainers are marketing. Here's what actually happens between double-clicking a question and seeing an answer.
Ready to Switch from Gauth AI?
Join thousands of students using FastSolve for instant, invisible LMS answers.
or add the Chrome extension