# OneBoard vs Calculator Sci Unit Converter

The clearest difference is price: OneBoard at Free against Calculator Sci Unit Converter's $1.99. OneBoard also leads on rating (5.0 vs 4.0). Calculator Sci Unit Converter's advantage is update cadence (monthly vs every 3 months) and iOS requirement (13.0 vs 16.0). On review sentiment, ratings volume, ads and in-app purchases there is nothing between them.

OneBoard is free to download; Calculator Sci Unit Converter costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

OneBoard holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 2 and 2 respectively. Written reviews complicate that: 59% of OneBoard's written reviews are positive against 67% of Calculator Sci Unit Converter's, so the app with the better star average is not the one people write more warmly about.

OneBoard ships an update every 3 months, Calculator Sci Unit Converter monthly. The most recent releases landed on October 24, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | OneBoard | Calculator Sci Unit Converter |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/oneboard-snippets-clipboard/id1263389963/reviews)** | [4.0 (2 ratings)](https://appshunter.io/ios/app/calculator-sci-unit-converter/id6772422667/reviews) |
| Number of ratings | 2 | 2 |
| Positive reviews | 59.1% of reviews | **66.7% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Monthly** |
| Monetization | Paid | Paid |
| Size | 23 MB | 25 MB |
| Requires iOS | 16.0 | **13.0** |
| Devices | iPhone, iPad, Mac | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Chengdu Reinvent Technology Co., Ltd.](https://appshunter.io/developer/1250290964) | [Xiamen City Fanyou Network Technology Co., Ltd.](https://appshunter.io/developer/1842524161) |

## What reviewers say

### OneBoard

[App page](https://appshunter.io/ios/app/oneboard-snippets-clipboard/id1263389963)

Enhance your typing experience with a smart keyboard offering customizable shortcut phrases and versatile plugins. Personalize themes, sounds, and layouts for increased efficiency and a unique feel.

**Highlights:** Shortcut phrases with group management, Customizable smart plugins, Mechanical keyboard themes and sounds, Adjustable keyboard height, Clipboard and text reference tools, Quick query and search functionality

**Features:** Vision Pro support

**In-app purchases:** none


### Calculator Sci Unit Converter

[App page](https://appshunter.io/ios/app/calculator-sci-unit-converter/id6772422667)

This app offers a robust calculator with both standard and scientific functions. It includes a unit converter for various measurements and currency, plus helpful shortcuts for percentages, taxes, and tips. All calculations are saved locally for easy access.

**Highlights:** Standard and scientific calculator modes, Unit conversion for length, weight, temperature, currency, Full calculation history log, Percentage, tax, and tip calculation shortcuts, Offline functionality, Optimized for phone and tablet

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

**In-app purchases:** none


## Frequently asked questions

### Is OneBoard free?

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

### Is Calculator Sci Unit Converter free?

Calculator Sci Unit Converter costs $1.99, with no in-app purchases.

### Which has better reviews, OneBoard or Calculator Sci Unit Converter?

OneBoard is rated higher. OneBoard averages 5.0 out of 5 from 2 ratings, while Calculator Sci Unit Converter averages 4.0 from 2 ratings.

### Do OneBoard or Calculator Sci Unit Converter have ads?

Neither OneBoard nor Calculator Sci Unit Converter shows ads.

### Which is updated more often, OneBoard or Calculator Sci Unit Converter?

OneBoard ships an update every 3 months, and Calculator Sci Unit Converter monthly. Most recently, OneBoard was updated on October 24, 2026 and Calculator Sci Unit Converter on October 11, 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.*