# Scientific Calculator 991CW vs Calculator

The clearest difference is in-app purchases: Calculator at none against Scientific Calculator 991CW's 3. Scientific Calculator 991CW's advantage is update cadence (fortnightly vs monthly). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Scientific Calculator 991CW sells 3 in-app purchases, starting at $0.99 per month. Calculator asks for nothing beyond the download.

Scientific Calculator 991CW ships an update fortnightly, Calculator monthly. The most recent releases landed on October 24, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Scientific Calculator 991CW | Calculator |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Fortnightly** | Monthly |
| Size | 6 MB | 32 MB |
| Requires iOS | 17.0 | **16.4** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Murad Yaghi](https://appshunter.io/developer/1740110475) | [Hussain HUSSAIN NASEER](https://appshunter.io/developer/6801492349) |

## What reviewers say

### Scientific Calculator 991CW

[App page](https://appshunter.io/ios/app/scientific-calculator-991cw/id6777380822)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Pro | $0.99 | per month |
| Yearly Pro | $4.99 | per year |
| Lifetime Pro | $7.99 | one-time |


### Calculator

[App page](https://appshunter.io/ios/app/calculator-basic-plus-scientific/id6801492347)

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

**In-app purchases:** none


## Frequently asked questions

### Is Scientific Calculator 991CW free?

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

### Is Calculator free?

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

### Do Scientific Calculator 991CW or Calculator have ads?

Neither Scientific Calculator 991CW nor Calculator shows ads.

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

Scientific Calculator 991CW ships an update fortnightly, and Calculator monthly. Most recently, Scientific Calculator 991CW was updated on October 24, 2026 and Calculator on October 8, 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.*