# Mathway vs Scientific Calculator Plus 991

The clearest difference is review sentiment: Scientific Calculator Plus 991 at 92% against Mathway's 51%. Scientific Calculator Plus 991 also leads on device support (4 vs 2) and iOS requirement (15 vs 17.0). Mathway's advantage is ratings volume (425K vs 12K) and rating (4.9 vs 4.7). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Mathway sells 8 in-app purchases, starting at $9.99 per month and Scientific Calculator Plus 991 sells 4 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

Mathway holds the better App Store score, 4.9 against 4.7. That said, the two scores are not equally well evidenced: Mathway has 425K ratings behind it against 12K, so its average is the more settled of the two. Written reviews complicate that: 51% of Mathway's written reviews are positive against 92% of Scientific Calculator Plus 991's, so the app with the better star average is not the one people write more warmly about.

Mathway ships an update every 4 weeks, Scientific Calculator Plus 991 every 2 weeks. Both last shipped on September 25, 2026.

## The numbers

| Metric | Mathway | Scientific Calculator Plus 991 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (425K ratings)](https://appshunter.io/ios/app/mathway-math-problem-solver/id467329677/reviews)** | [4.7 (12K ratings)](https://appshunter.io/ios/app/scientific-calculator-plus-991/id1449106995/reviews) |
| Number of ratings | **425K** | 12K |
| Positive reviews | 50.6% of reviews | **91.8% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 4 weeks | **Every 2 weeks** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Best chart rank | **#110** | — |
| Size | 82 MB | 176 MB |
| Requires iOS | 17.0 | **15** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 12+ |
| Developer | [Chegg, Inc.](https://appshunter.io/developer/385758166) | [Tran Duy](https://appshunter.io/developer/1449106994) |

## What reviewers say

### Mathway

[App page](https://appshunter.io/ios/app/mathway-math-problem-solver/id467329677)

**Currently charting:** #110 Top Grossing · Education (US App Store)

Solve math problems instantly by taking a photo or typing your question. Get step-by-step solutions for algebra, graphing, calculus, and more. Understand complex math concepts with unlimited access to answers.

**Highlights:** Math problem solver, Homework scanner, Step-by-step solutions, Algebra solver, Graphing calculator, Calculus solver

**Features:** Vision Pro support

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Steps (Monthly) | $9.99 | per month |
| Steps (Monthly) | $9.99 | per month |
| Steps (Monthly) | $9.99 | per month |
| Steps (Monthly) | $19.99 | per month |
| Steps (Annual) | $39.99 | per year |
| Steps (Annual) | $39.99 | per year |
| Steps (Annual) | $39.99 | per year |
| Steps (Annual) | $79.99 | per year |

**What reviewers like**

- 🚀 Reliable and accurate
- 👍 Helpful for math homework and studying
- 🚀 Fast and efficient
- 👍 Explains step-by-step solutions
- 👍 Supports wide range of math topics

**What reviewers complain about**

- 💰 Subscription required for full features
- 🐛 Inconsistent performance, crashes
- 🔍 Difficulty cropping/uploading photos
- 🔍 Limited free features, paywall

**Reported bugs**

- Camera issues, unable to focus on problems
- Subscription issues, unable to access paid features

**Requested features**

- Dark mode option
- Ability to copy/paste equations
- Improved free version with step-by-step solutions


### Scientific Calculator Plus 991

[App page](https://appshunter.io/ios/app/scientific-calculator-plus-991/id1449106995)

This app is a powerful scientific calculator with graphing capabilities, a formula library, and a unit converter. It offers natural display input, advanced math functions for algebra, calculus, and statistics, and supports various number bases and formats.

**Highlights:** Natural display input, Graphing module, Formula library, Unit and currency converter, Algebra and calculus tools, Matrix and vector operations, Statistical calculations

**Features:** Family Sharing, Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Calculator month subscription | $1.99 | per month |
| Calculator yearly subscription | $3.99 | per year |
| Calculator Premium | $5.99 | one-time |
| Calculator Pro | $5.99 | one-time |

**What reviewers like**

- 👍 Intuitive and easy to use
- 🚀 Powerful and feature-rich
- 💡 Customizable interface and settings
- 🔍 Extensive library of formulas and equations
- ⚙️ Handles complex math and scientific functions well

**What reviewers complain about**

- 🐛 Occasional bugs and input issues
- 🔀 Confusing layout and button placement
- 💰 Some advanced features locked behind paywall

**Reported bugs**

- Keyboard input stops working after switching screens
- Incorrect calculation results for certain operations
- App crashes on some devices after recent update

**Requested features**

- Add option to change display font and color
- Improve cursor control and editing capabilities
- Implement auto-simplification for complex expressions
- Add more handwriting font options
- Expand graphing and equation solving features


## Frequently asked questions

### Is Mathway free?

Mathway is free to download, with in-app purchases available.

### Is Scientific Calculator Plus 991 free?

Scientific Calculator Plus 991 is free to download, with in-app purchases available.

### Which has better reviews, Mathway or Scientific Calculator Plus 991?

Mathway is rated higher. Mathway averages 4.9 out of 5 from 425K ratings, while Scientific Calculator Plus 991 averages 4.7 from 12K ratings.

### Do Mathway or Scientific Calculator Plus 991 have ads?

Both Mathway and Scientific Calculator Plus 991 show ads.

### Which is updated more often, Mathway or Scientific Calculator Plus 991?

Mathway ships an update every 4 weeks, and Scientific Calculator Plus 991 every 2 weeks. Most recently, Mathway was updated on September 25, 2026 and Scientific Calculator Plus 991 on September 25, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*