# USmart vs 科士达光伏+

The clearest difference is update cadence: 科士达光伏+ at every 3 weeks against USmart's every 3 months. USmart's advantage is iOS requirement (11.0 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.

USmart ships an update every 3 months, 科士达光伏+ every 3 weeks. The most recent releases landed on September 13, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | USmart | 科士达光伏+ |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 3 weeks** |
| Size | 128 MB | 16 MB |
| Requires iOS | **11.0** | 15.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [杭州品联科技有限公司](https://appshunter.io/developer/1133906765) | [Shenzhen Kstar Science & Technology Co., Ltd.](https://appshunter.io/developer/1460236605) |

## What reviewers say

### USmart

[App page](https://appshunter.io/ios/app/usmart/id1449674452)

**In-app purchases:** none


### 科士达光伏+

[App page](https://appshunter.io/ios/app/plus/id1460236606)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is USmart free?

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

### Is 科士达光伏+ free?

科士达光伏+ is free to download, with no in-app purchases.

### Do USmart or 科士达光伏+ have ads?

Neither USmart nor 科士达光伏+ shows ads.

### Which is updated more often, USmart or 科士达光伏+?

USmart ships an update every 3 months, and 科士达光伏+ every 3 weeks. Most recently, USmart was updated on September 13, 2026 and 科士达光伏+ on September 8, 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.*