# Smart M vs 光伏电站卫士

The clearest difference is update cadence: Smart M at monthly against 光伏电站卫士's every 2 months. Smart M also leads on iOS requirement (12.0 vs 15.0). 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.

Smart M ships an update monthly, 光伏电站卫士 every 2 months. The most recent releases landed on October 24, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | Smart M | 光伏电站卫士 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 2 months |
| Size | 99 MB | 103 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Slenergy Technology(A.H.)Co.,Ltd.](https://appshunter.io/developer/1701018754) | [隆基绿能科技股份有限公司](https://appshunter.io/developer/1424733663) |

## What reviewers say

### Smart M

[App page](https://appshunter.io/ios/app/smart-m/id6462580670)

**Features:** macOS Compatibility

**In-app purchases:** none


### 光伏电站卫士

[App page](https://appshunter.io/ios/app/id6532595764)

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

**In-app purchases:** none


## Frequently asked questions

### Is Smart M free?

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

### Is 光伏电站卫士 free?

光伏电站卫士 is free to download, with no in-app purchases.

### Do Smart M or 光伏电站卫士 have ads?

Neither Smart M nor 光伏电站卫士 shows ads.

### Which is updated more often, Smart M or 光伏电站卫士?

Smart M ships an update monthly, and 光伏电站卫士 every 2 months. Most recently, Smart M was updated on October 24, 2026 and 光伏电站卫士 on October 22, 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.*