# Cloud Campus vs Scientific Calculator Plus 991

The clearest difference is rating: Scientific Calculator Plus 991 at 4.7 against Cloud Campus's 3.0. Scientific Calculator Plus 991 also leads on update cadence (fortnightly vs every 5 months) and ratings volume (13K vs 2). Cloud Campus's advantage is in-app purchases (none vs 4) and ads (none vs shown). On price and device support 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. Cloud Campus asks for nothing beyond the download.

Scientific Calculator Plus 991 holds the better App Store score, 4.7 against 3.0. That said, the two scores are not equally well evidenced: Scientific Calculator Plus 991 has 13K ratings behind it against 2, so its average is the more settled of the two.

Cloud Campus ships an update every 5 months, Scientific Calculator Plus 991 fortnightly. The most recent releases landed on November 2, 2026 and November 12, 2026 respectively.

## The numbers

| Metric | Cloud Campus | Scientific Calculator Plus 991 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (2 ratings)](https://appshunter.io/ios/app/cloud-campus/id1170990664/reviews) | **[4.7 (13K ratings)](https://appshunter.io/ios/app/scientific-calculator-plus-991/id1449106995/reviews)** |
| Number of ratings | 2 | **13K** |
| Positive reviews | — | 91.8% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 5 months | **Fortnightly** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 93 MB | 169 MB |
| Requires iOS | **11.0** | 15 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 12+ |
| Developer | [Zhiyu Feng](https://appshunter.io/developer/1170990663) | [Tran Duy](https://appshunter.io/developer/1449106994) |

## What reviewers say

### Cloud Campus

[App page](https://appshunter.io/ios/app/cloud-campus/id1170990664)

This platform helps educational institutions manage content on student devices. It integrates interactive presentations, collaboration tools, and real-time assessments for a seamless learning experience.

**Highlights:** Cooperative education program benefits, Multiple teaching and learning methods, Content management for student devices, Interactive presentations, Collaboration tools, Real-time assessment

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 Cloud Campus free?

Cloud Campus is free to download, with no in-app purchases.

### Is Scientific Calculator Plus 991 free?

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

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

Scientific Calculator Plus 991 is rated higher. Cloud Campus averages 3.0 out of 5 from 2 ratings, while Scientific Calculator Plus 991 averages 4.7 from 13K ratings.

### Do Cloud Campus or Scientific Calculator Plus 991 have ads?

Scientific Calculator Plus 991 shows ads; Cloud Campus does not.

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

Cloud Campus ships an update every 5 months, and Scientific Calculator Plus 991 fortnightly. Most recently, Cloud Campus was updated on November 2, 2026 and Scientific Calculator Plus 991 on November 12, 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.*