# Calculator . vs Scientific Calculator 991EX

The clearest difference is rating: Calculator . at 3.5 against Scientific Calculator 991EX's 1.0. Calculator . also leads on update cadence (fortnightly vs every 2 months) and ratings volume (13 vs 1). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Calculator . sells 4 in-app purchases, starting at $4.99 per 7 days and Scientific Calculator 991EX sells 3 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

Calculator . holds the better App Store score, 3.5 against 1.0. That said, the two scores are not equally well evidenced: Calculator . has 13 ratings behind it against 1, so its average is the more settled of the two.

Calculator . ships an update fortnightly, Scientific Calculator 991EX every 2 months. Both last shipped on November 10, 2026.

## The numbers

| Metric | Calculator . | Scientific Calculator 991EX |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.5 (13 ratings)](https://appshunter.io/ios/app/calculator-ai-math-solver/id6776479693/reviews)** | [1.0 (1 ratings)](https://appshunter.io/ios/app/scientific-calculator-991ex/id6801710317/reviews) |
| Number of ratings | **13** | 1 |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 2 months |
| Monetization | Free with in-app purchases | — |
| Size | 7 MB | 9 MB |
| Requires iOS | **16.0** | 17.0 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Hong Kong Global Cross-Border E-Commerce Co., Limited](https://appshunter.io/developer/1693750577) | [Murad Yaghi](https://appshunter.io/developer/1740110475) |

## What reviewers say

### Calculator .

[App page](https://appshunter.io/ios/app/calculator-ai-math-solver/id6776479693)

This utility app combines standard and scientific calculations with unit and currency conversions. It features a clean interface, calculation history, and automatic rate updates for currencies. Easily switch between functions without leaving the app.

**Highlights:** Standard and scientific calculator, Unit conversion (length, weight, area, volume, temperature), Currency conversion with automatic rate updates, Calculation history, Distraction-free dark interface

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Peak | $4.99 | per 7 days |
| Weekly Ring | $9.99 | per 7 days |
| Yearly Peak | $39.99 | per year |
| Yearly Ring | $39.99 | per year |


### Scientific Calculator 991EX

[App page](https://appshunter.io/ios/app/scientific-calculator-991ex/id6801710317)

**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 | $14.99 | one-time |


## Frequently asked questions

### Is Calculator . free?

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

### Is Scientific Calculator 991EX free?

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

### Which has better reviews, Calculator . or Scientific Calculator 991EX?

Calculator . is rated higher. Calculator . averages 3.5 out of 5 from 13 ratings, while Scientific Calculator 991EX averages 1.0 from 1 ratings.

### Do Calculator . or Scientific Calculator 991EX have ads?

Neither Calculator . nor Scientific Calculator 991EX shows ads.

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

Calculator . ships an update fortnightly, and Scientific Calculator 991EX every 2 months. Most recently, Calculator . was updated on November 10, 2026 and Scientific Calculator 991EX on November 10, 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.*