# 南方选型系统 vs 空气焓湿计算

The clearest difference is update cadence: 南方选型系统 at every 3 months against 空气焓湿计算's every 12 months. 空气焓湿计算's advantage is iOS requirement (9.0 vs 13.0). On price, rating, ratings volume and ads there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 5.0 for 南方选型系统 against 5.0 for 空气焓湿计算. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

南方选型系统 ships an update every 3 months, 空气焓湿计算 every 12 months. Both last shipped on November 2, 2026.

## The numbers

| Metric | 南方选型系统 | 空气焓湿计算 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/id1095222913/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/id1244060244/reviews) |
| Number of ratings | 1 | 1 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 12 months |
| Size | 24 MB | 25 MB |
| Requires iOS | 13.0 | **9.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 17+ | 12+ |
| Developer | [旭 汤](https://appshunter.io/developer/1034622624) | [建华 傅](https://appshunter.io/developer/1265699210) |

## What reviewers say

### 南方选型系统

[App page](https://appshunter.io/ios/app/id1095222913)

**Features:** macOS Compatibility

**In-app purchases:** none


### 空气焓湿计算

[App page](https://appshunter.io/ios/app/id1244060244)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 南方选型系统 free?

南方选型系统 is free to download, with no in-app purchases.

### Is 空气焓湿计算 free?

空气焓湿计算 is free to download, with no in-app purchases.

### Which has better reviews, 南方选型系统 or 空气焓湿计算?

南方选型系统 and 空气焓湿计算 are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.

### Do 南方选型系统 or 空气焓湿计算 have ads?

Neither 南方选型系统 nor 空气焓湿计算 shows ads.

### Which is updated more often, 南方选型系统 or 空气焓湿计算?

南方选型系统 ships an update every 3 months, and 空气焓湿计算 every 12 months. Most recently, 南方选型系统 was updated on November 2, 2026 and 空气焓湿计算 on November 2, 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.*