# Scientific Calculator Plus 991 vs alpha platform

The clearest difference is rating: Scientific Calculator Plus 991 at 4.7 against alpha platform's 2.7. Scientific Calculator Plus 991 also leads on ratings volume (13K vs 11) and update cadence (fortnightly vs every 6 weeks). alpha platform's advantage is in-app purchases (none vs 4) and ads (none vs shown). On price, device support and iOS requirement 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. alpha platform asks for nothing beyond the download.

Scientific Calculator Plus 991 holds the better App Store score, 4.7 against 2.7. That said, the two scores are not equally well evidenced: Scientific Calculator Plus 991 has 13K ratings behind it against 11, so its average is the more settled of the two.

Scientific Calculator Plus 991 ships an update fortnightly, alpha platform every 6 weeks. The most recent releases landed on October 29, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | Scientific Calculator Plus 991 | alpha platform |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (13K ratings)](https://appshunter.io/ios/app/scientific-calculator-plus-991/id1449106995/reviews)** | [2.7 (11 ratings)](https://appshunter.io/ios/app/alpha-platform/id6458979028/reviews) |
| Number of ratings | **13K** | 11 |
| Positive reviews | 91.7% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Fortnightly** | Every 6 weeks |
| Monetization | Free with in-app purchases | **Free** |
| Size | 169 MB | 34 MB |
| Requires iOS | 15 | 15.0 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Tran Duy](https://appshunter.io/developer/1449106994) | [ABDEL RAHMAN ABU ZAID](https://appshunter.io/developer/1604076254) |

## 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


### alpha platform

[App page](https://appshunter.io/ios/app/alpha-platform/id6458979028)

An educational institution offering Jordanian national and international curricula for primary and secondary students. It focuses on carefully selected teaching staff supervised by experienced experts. The mission is to make education accessible everywhere.

**Highlights:** National and international curricula, Primary and secondary education, Expert supervised teaching staff, Accessible education, Online learning

**Features:** macOS Compatibility, Vision Pro support

**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 alpha platform free?

alpha platform is free to download, with no in-app purchases.

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

Scientific Calculator Plus 991 is rated higher. Scientific Calculator Plus 991 averages 4.7 out of 5 from 13K ratings, while alpha platform averages 2.7 from 11 ratings.

### Do Scientific Calculator Plus 991 or alpha platform have ads?

Scientific Calculator Plus 991 shows ads; alpha platform does not.

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

Scientific Calculator Plus 991 ships an update fortnightly, and alpha platform every 6 weeks. Most recently, Scientific Calculator Plus 991 was updated on October 29, 2026 and alpha platform on October 21, 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.*