# HVAC Smart vs 艾斯托

The clearest difference is update cadence: 艾斯托 at monthly against HVAC Smart's every 9 months. 艾斯托 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, 艾斯托 monthly. The most recent releases landed on October 3, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | HVAC Smart | 艾斯托 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 9 months | **Monthly** |
| Size | 26 MB | 105 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) | [hangzhou panzi technology CO.ltd](https://appshunter.io/developer/1559705409) |

## 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


### 艾斯托

[App page](https://appshunter.io/ios/app/id6450293567)

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

**In-app purchases:** none


## Frequently asked questions

### Is HVAC Smart free?

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

### Is 艾斯托 free?

艾斯托 is free to download, with no in-app purchases.

### Do HVAC Smart or 艾斯托 have ads?

Neither HVAC Smart nor 艾斯托 shows ads.

### Which is updated more often, HVAC Smart or 艾斯托?

HVAC Smart ships an update every 9 months, and 艾斯托 monthly. Most recently, HVAC Smart was updated on October 3, 2026 and 艾斯托 on October 24, 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.*