# Scientific Calculator Plus 991 vs Ezy Studies

The clearest difference is in-app purchases: Ezy Studies at none against Scientific Calculator Plus 991's 4. Ezy Studies also leads on iOS requirement (12.0 vs 15). Scientific Calculator Plus 991's advantage is device support. On price there is nothing between them.

Both are free to download. Scientific Calculator Plus 991 sells 4 in-app purchases, starting at $1.99 per month. Ezy Studies asks for nothing beyond the download.

## The numbers

| Metric | Scientific Calculator Plus 991 | Ezy Studies |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (12K ratings)](https://appshunter.io/ios/app/scientific-calculator-plus-991/id1449106995/reviews)** | — |
| Number of ratings | **12K** | — |
| Positive reviews | 91.8% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | — |
| Update frequency | Every 2 weeks | — |
| Monetization | Free with in-app purchases | — |
| Size | 176 MB | 25 MB |
| Requires iOS | 15 | **12.0** |
| Devices | **iPhone, iPad, iPod, Mac** | — |
| Age rating | 12+ | 4+ |
| Developer | [Tran Duy](https://appshunter.io/developer/1449106994) | [Mohamed Ghonaim](https://appshunter.io/developer/1557031724) |

## What reviewers say

### 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


### Ezy Studies

[App page](https://appshunter.io/ios/app/ezy-studies/id6477299525)

**In-app purchases:** none


## Frequently asked questions

### Is Scientific Calculator Plus 991 free?

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

### Is Ezy Studies free?

Ezy Studies is free to download, with no in-app purchases.

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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.*