# VOCs圈子 vs Cryogenics Pro

The clearest difference is in-app purchases: VOCs圈子 at none against Cryogenics Pro's 3. VOCs圈子 also leads on iOS requirement (12.0 vs 16.0). Cryogenics Pro's advantage is update cadence (every 10 days vs every 2 months). On price, ads and device support there is nothing between them.

Both are free to download. Cryogenics Pro sells 3 in-app purchases, starting at $0.99 per month. VOCs圈子 asks for nothing beyond the download.

VOCs圈子 ships an update every 2 months, Cryogenics Pro every 10 days. The most recent releases landed on October 30, 2026 and November 9, 2026 respectively.

## The numbers

| Metric | VOCs圈子 | Cryogenics Pro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[1.0 (1 ratings)](https://appshunter.io/ios/app/cryogenics-pro/id6757348860/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 10 days** |
| Monetization | — | Free with in-app purchases |
| Size | 42 MB | 55 MB |
| Requires iOS | **12.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [Yiwu Advanced Talent Agency Co., Ltd.](https://appshunter.io/developer/1544184396) | [立中 侯](https://appshunter.io/developer/1532582722) |

## What reviewers say

### VOCs圈子

[App page](https://appshunter.io/ios/app/vocs/id6737539277)

**Features:** macOS Compatibility

**In-app purchases:** none


### Cryogenics Pro

[App page](https://appshunter.io/ios/app/cryogenics-pro/id6757348860)

This app provides thermodynamic calculations and equipment sizing tools for engineers. It offers accurate fluid data and process analysis using the CoolProp library, with features like unit conversion and basic fluid property queries.

**Highlights:** Thermodynamic calculations, Equipment sizing tools, CoolProp library integration, Unit converter, Basic fluid properties, Engineering guidelines

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $0.99 | per month |
| Yearly Subscription | $9.99 | per year |
| Lifecycle purchase. | $29.99 | one-time |


## Frequently asked questions

### Is VOCs圈子 free?

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

### Is Cryogenics Pro free?

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

### Do VOCs圈子 or Cryogenics Pro have ads?

Neither VOCs圈子 nor Cryogenics Pro shows ads.

### Which is updated more often, VOCs圈子 or Cryogenics Pro?

VOCs圈子 ships an update every 2 months, and Cryogenics Pro every 10 days. Most recently, VOCs圈子 was updated on October 30, 2026 and Cryogenics Pro on November 9, 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.*