Gauth, Photomath, Mathway & Symbolab Alternatives: Step-by-Step STEM Help Without a Forced Subscription
Tired of homework apps that lock step-by-step explanations behind monthly subscriptions or ad walls? Compare Gauth, Photomath, Mathway, Symbolab, and Stemulus on Android.
Figure 01 · Paywalled Intermediate Steps vs. Full Worked Derivation
If you have tried using Gauth (formerly Gauthmath), Photomath, Mathway, or Symbolab during a late-night homework session, you have probably run into the same frustration: you scan a problem, see the final answer, tap “Show Steps”, and hit a recurring monthly or annual subscription paywall. Or worse, you sit through full-screen video ads and pop-ups just to check two homework questions.
Here is an honest, side-by-side comparison of the leading math and science homework apps on Android, what each tool does best, and why we built Stemulus for students who want clear steps, verified arithmetic, and flexible one-time credits.
Side-by-side comparison: Stemulus vs. Gauth, Photomath, Mathway & Symbolab
| Feature | Stemulus (Android) | Gauth (Gauthmath) | Photomath | Mathway | Symbolab |
|---|---|---|---|---|---|
| Account sign-in required to start? | No (10 free credits immediately) | Often prompts sign-in / tickets | Optional for basic equations | Optional for final answers | Optional for top-level steps |
| Are full steps included on every check? | Yes, always | Limited free checks / Plus paywall | Basic equations free; word problems & textbooks require Plus | No (steps require subscription) | Intermediate sub-steps require Pro |
| One-time credit pack option (no subscription)? | Yes: $2.99 for 50 Scan Credits | No (Plus subscription) | No (Plus subscription) | No (Monthly/Annual subscription) | No (Pro subscription) |
| Camera crop preview before spending credit? | Yes (with flash toggle) | Yes | Live viewfinder | Yes | Yes |
| Arithmetic verification check? | Yes (substitutes results back into equations where supported) | Varies (LLM output can hallucinate arithmetic) | Deterministic for pure equations | Deterministic for pure equations | Deterministic for symbolic math |
| Physics & Chemistry word problems? | Yes (Physics & Chemistry) | Yes | Very limited | Separate modes, steps paywalled | Limited |
| Generates Study Guides & Practice Rounds from your scans? | Yes (Study Guide Generator) | No | No | No | Separate quiz module |
| One-tap LaTeX copy for lab reports? | Yes | No | No | No | Partial |
Where each homework app shines and where students get stuck
1. Gauth (Gauthmath)
Gauth became popular because it uses multimodal AI to read word problems across math, physics, and chemistry.
- The catch: Many students look for an app like Gauth or a Gauth alternative for two reasons: aggressive subscription upsells/pop-ups when free daily allowances run out, and unverified LLM arithmetic where the explanation looks confident but the final calculation is wrong.
- How Stemulus differs: Stemulus is calm and distraction-free (no noisy streaks, pop-up wheels, or guilt notifications), runs an automated arithmetic substitution check on supported calculations, and lets you buy a $2.99 one-time pack of 50 Scan Credits whenever you need extra scans for an exam week.
2. Photomath
Photomath is fast and reliable when you point your camera at a clean algebraic equation like 2x² − 7x + 3 = 0.
- The catch: As soon as your assignment shifts to multi-sentence algebra or inequality word problems, geometry proofs, physics numericals, or chemistry stoichiometry, Photomath either cannot parse the paragraph or gates the textbook solution behind Photomath Plus.
3. Mathway
Mathway covers a wide range of symbolic math and science calculators.
- The catch: Mathway gives you the final answer for free, but every single step-by-step explanation requires a paid subscription. If your teacher grades your work, or if you are trying to figure out why your answer on paper didn’t match, a bare final number doesn’t help.
4. Symbolab
Symbolab is well known among college calculus and differential equations students for its symbolic input pad.
- The catch: While top-level steps are visible, expanding the crucial intermediate algebraic or trigonometric steps (“Show Steps”) requires a Symbolab Pro subscription.
Why Android STEM students switch to Stemulus
We designed Stemulus for Android around four principles that respect both your wallet and your grade:
- Every problem check includes every step: We never show you a final answer and then hold the intermediate steps hostage behind a paywall. When you check a problem in the Homework Scanner App, you get the complete numbered breakdown (
01,02,03), the mathematical reason for each move, and textbook-typeset math. - Preview before you spend a credit: Capturing a photo or selecting a screenshot from your Android gallery opens a crop preview first. You never lose a credit to a blurry photo or accidental shutter tap.
- Honest accuracy with arithmetic checks: Every solution clearly states that AI-generated work can contain mistakes. Where supported, Stemulus automatically substitutes the final result back into the original equation to verify the math, and tells you to review the result when a check cannot confirm it.
- Built-in exam prep (Assignments, Study Guides & Practice Rounds): Saving problems to an assignment lets you tag what you are Still stuck on, generate a custom study guide, and practice three new questions with progressive hints. Reopening saved solutions, study guides, and practice sets is always free and works offline.
Try Stemulus on Google Play
Download Stemulus on Google Play to start with 10 free scan credits, with no account creation or credit card required.
FAQ
Frequently asked questions
What is the best Gauth alternative on Android without ads or forced subscriptions?
Stemulus is an Android STEM homework scanner and study tool that includes full numbered step-by-step explanations on every check, starts with 10 free scan credits (no sign-in required), and offers a one-time $2.99 pack of 50 Scan Credits so you never have to commit to a recurring monthly subscription.
Which math app shows steps without a monthly subscription?
Unlike Mathway and Symbolab, which gate intermediate steps behind recurring subscriptions, every problem check in Stemulus includes the complete numbered step-by-step breakdown, textbook math rendering, and arithmetic verification check.
Can one Android app handle Math, Physics, and Chemistry together?
Yes. Stemulus handles Algebra, Geometry, Trigonometry, Pre-Calculus, Calculus, Statistics, Physics, and Chemistry in a single Android app, and turns your saved problems into custom study guides and 3-question practice rounds.