# HVAC Smart vs 筑星云BIM

The clearest difference is update cadence: 筑星云BIM at fortnightly against HVAC Smart's every 9 months. 筑星云BIM also leads on iOS requirement (12.0 vs 15.6). On price, ads, in-app purchases and device support there is nothing between them.

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

HVAC Smart ships an update every 9 months, 筑星云BIM fortnightly. The most recent releases landed on November 3, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | HVAC Smart | 筑星云BIM |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 9 months | **Fortnightly** |
| Size | 26 MB | 32 MB |
| Requires iOS | 15.6 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [ZHUHAI VDATA TECHNOLOGY CO., LTD](https://appshunter.io/developer/1239657281) | [Shanghai Zhuxing Cloud Computing Technology Co. Ltd.](https://appshunter.io/developer/1867009939) |

## What reviewers say

### HVAC Smart

[App page](https://appshunter.io/ios/app/hvac-smart/id1511650678)

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

**In-app purchases:** none


### 筑星云BIM

[App page](https://appshunter.io/ios/app/bim/id6759941007)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is HVAC Smart free?

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

### Is 筑星云BIM free?

筑星云BIM is free to download, with no in-app purchases.

### Do HVAC Smart or 筑星云BIM have ads?

Neither HVAC Smart nor 筑星云BIM shows ads.

### Which is updated more often, HVAC Smart or 筑星云BIM?

HVAC Smart ships an update every 9 months, and 筑星云BIM fortnightly. Most recently, HVAC Smart was updated on November 3, 2026 and 筑星云BIM on November 5, 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.*