# 单位&汇率换算 vs Hardness Unit Converter

The clearest difference is rating: 单位&汇率换算 at 5.0 against Hardness Unit Converter's 4.0. 单位&汇率换算 also leads on iOS requirement (11.0 vs 15.6). Hardness Unit Converter's advantage is review sentiment (17% vs 0%) and ratings volume (7 vs 1). On price, update cadence, ads and in-app purchases there is nothing between them.

单位&汇率换算 costs $1.99 and Hardness Unit Converter $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

单位&汇率换算 holds the better App Store score, 5.0 against 4.0. That said, the two scores are not equally well evidenced: Hardness Unit Converter has 7 ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 0% of 单位&汇率换算's written reviews are positive against 17% of Hardness Unit Converter's, so the app with the better star average is not the one people write more warmly about.

单位&汇率换算 ships an update every 3 months, Hardness Unit Converter every 5 months. The most recent releases landed on November 1, 2026 and November 13, 2026 respectively.

## The numbers

| Metric | 单位&汇率换算 | Hardness Unit Converter |
| --- | --- | --- |
| Price | $1.99 | $1.99 |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/and/id513618181/reviews)** | [4.0 (7 ratings)](https://appshunter.io/ios/app/hardness-unit-converter/id1409248484/reviews) |
| Number of ratings | 1 | **7** |
| Positive reviews | 0.0% of reviews | **16.7% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 5 months |
| Monetization | Paid | Paid |
| Size | 8 MB | 1 MB |
| Requires iOS | **11.0** | 15.6 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Xin Zhou](https://appshunter.io/developer/505384440) | [Kei Suefuji](https://appshunter.io/developer/1388335881) |

## What reviewers say

### 单位&汇率换算

[App page](https://appshunter.io/ios/app/and/id513618181)

This app offers comprehensive unit conversion for area, weight, volume, temperature, length, speed, pressure, fuel consumption, power, energy, torque, and angles. It also includes currency exchange for 46 countries and a calculator with tax computation and data transfer between functions.

**Highlights:** Extensive unit conversions (area, weight, volume, etc.), Currency exchange for 46 countries, Integrated calculator with tax function, Data transfer between converter and calculator, Unit search functionality, Supports various mathematical operations

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

**In-app purchases:** none


### Hardness Unit Converter

[App page](https://appshunter.io/ios/app/hardness-unit-converter/id1409248484)

Easily convert hardness values between 12 different units, including Vickers, Brinell, Rockwell, and Shore. Input your value and select the desired unit for instant conversion, referencing ASTM E 140 standards and polynomial approximations for accuracy.

**Highlights:** Converts 12 hardness units, Vickers, Brinell, Rockwell, Shore support, Tensile strength conversion, ASTM E 140 reference, Polynomial approximation for data, Simple input and unit selection

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

**In-app purchases:** none


## Frequently asked questions

### Is 单位&汇率换算 free?

单位&汇率换算 costs $1.99, with no in-app purchases.

### Is Hardness Unit Converter free?

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

### Which has better reviews, 单位&汇率换算 or Hardness Unit Converter?

单位&汇率换算 is rated higher. 单位&汇率换算 averages 5.0 out of 5 from 1 ratings, while Hardness Unit Converter averages 4.0 from 7 ratings.

### Do 单位&汇率换算 or Hardness Unit Converter have ads?

Neither 单位&汇率换算 nor Hardness Unit Converter shows ads.

### Which is updated more often, 单位&汇率换算 or Hardness Unit Converter?

单位&汇率换算 ships an update every 3 months, and Hardness Unit Converter every 5 months. Most recently, 单位&汇率换算 was updated on November 1, 2026 and Hardness Unit Converter on November 13, 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.*