# Calculator HD vs Scientific Computer

The clearest difference is rating: Scientific Computer at 5.0 against Calculator HD's 4.2. Scientific Computer also leads on ads (none vs shown). Calculator HD's advantage is in-app purchases (none vs 1) and update cadence (every 6 days vs every 2 weeks). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Scientific Computer sells 1 in-app purchase, starting at $5.99 per 7 days. Calculator HD asks for nothing beyond the download.

Scientific Computer holds the better App Store score, 5.0 against 4.2. That said, the two scores are not equally well evidenced: Calculator HD has 11 ratings behind it against 1, so its average is the more settled of the two.

Calculator HD ships an update every 6 days, Scientific Computer every 2 weeks. The most recent releases landed on October 12, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Calculator HD | Scientific Computer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.2 (11 ratings)](https://appshunter.io/ios/app/calculator-hd-professional/id6462440436/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/scientific-computer/id6737824642/reviews)** |
| Number of ratings | **11** | 1 |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 6 days** | Every 2 weeks |
| Monetization | **Ad-supported** | Freemium |
| Size | 84 MB | 118 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Guangzhou Brilliance Forever Information Technology Co.Ltd](https://appshunter.io/developer/1698668731) | [Wuhan Sheshou Technology Co.,Ltd.](https://appshunter.io/developer/1645260509) |

## What reviewers say

### Calculator HD

[App page](https://appshunter.io/ios/app/calculator-hd-professional/id6462440436)

A professional and practical calculator with voice reporting and customizable themes. It saves historical calculations and supports bracket operations and error correction.

**Highlights:** Retro voice reporting, Customizable theme colors, Background image settings, Real-time historical records, Bracket operations support, Error deletion and recall

**Features:** macOS Compatibility

**In-app purchases:** none


### Scientific Computer

[App page](https://appshunter.io/ios/app/scientific-computer/id6737824642)

This app offers a comprehensive suite of calculation tools, including basic, scientific, mortgage, and tax calculators. It also provides unit conversions, date calculations, and a compass with location data. Manage your finances, plan projects, and navigate with ease using its multifunctional features.

**Highlights:** Basic and scientific calculations, Mortgage and personal income tax calculator, Date and unit conversion, Compass with GPS data, Score calculator, Base conversion

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| One week membership | $5.99 | per 7 days |


## Frequently asked questions

### Is Calculator HD free?

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

### Is Scientific Computer free?

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

### Which has better reviews, Calculator HD or Scientific Computer?

Scientific Computer is rated higher. Calculator HD averages 4.2 out of 5 from 11 ratings, while Scientific Computer averages 5.0 from 1 ratings.

### Do Calculator HD or Scientific Computer have ads?

Calculator HD shows ads; Scientific Computer does not.

### Which is updated more often, Calculator HD or Scientific Computer?

Calculator HD ships an update every 6 days, and Scientific Computer every 2 weeks. Most recently, Calculator HD was updated on October 12, 2026 and Scientific Computer on October 7, 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.*