# III vs 夏恩英语

The clearest difference is price: 夏恩英语 at Free against III's $2.99. 夏恩英语 also leads on rating (5.0 vs 4.0) and update cadence (every 2 months vs every 17 months). III's advantage is iOS requirement (11.0 vs 13.0). On ratings volume, ads, in-app purchases and device support there is nothing between them.

夏恩英语 is free to download; III costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

夏恩英语 holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 1 and 2 respectively.

III ships an update every 17 months, 夏恩英语 every 2 months. The most recent releases landed on August 24, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | III | 夏恩英语 |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | [4.0 (1 ratings)](https://appshunter.io/ios/app/iii-v-comp/id475184953/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/id1428648753/reviews)** |
| Number of ratings | 1 | **2** |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 17 months | **Every 2 months** |
| Monetization | Paid | — |
| Size | 10 MB | 498 MB |
| Requires iOS | **11.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Takuya Ishikawa](https://appshunter.io/developer/468311118) | [皊 董](https://appshunter.io/developer/1342525657) |

## What reviewers say

### III

[App page](https://appshunter.io/ios/app/iii-v-comp/id475184953)

Calculate material properties for III-V compound semiconductors like AlGaInAsP. It determines compositions, lattice constant, strain, bandgap, and effective masses for InP or GaAs substrates.

**Highlights:** III-V compound semiconductor calculations, Material property determination, Composition calculation (x, y, z), Lattice constant and strain analysis, Bandgap and effective mass calculation, Supports InP and GaAs substrates

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

**In-app purchases:** none


### 夏恩英语

[App page](https://appshunter.io/ios/app/id1428648753)

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

**In-app purchases:** none


## Frequently asked questions

### Is III free?

III costs $2.99, with no in-app purchases.

### Is 夏恩英语 free?

夏恩英语 is free to download, with no in-app purchases.

### Which has better reviews, III or 夏恩英语?

夏恩英语 is rated higher. III averages 4.0 out of 5 from 1 ratings, while 夏恩英语 averages 5.0 from 2 ratings.

### Do III or 夏恩英语 have ads?

Neither III nor 夏恩英语 shows ads.

### Which is updated more often, III or 夏恩英语?

III ships an update every 17 months, and 夏恩英语 every 2 months. Most recently, III was updated on August 24, 2026 and 夏恩英语 on September 26, 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.*