# KF Solar PRO vs Legacy Industry

The clearest difference is update cadence: KF Solar PRO at every 3 weeks against Legacy Industry's every 12 months. KF Solar PRO also leads on iOS requirement (8.0 vs 12.0). 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.

KF Solar PRO ships an update every 3 weeks, Legacy Industry every 12 months. The most recent releases landed on November 3, 2026 and November 7, 2026 respectively.

## The numbers

| Metric | KF Solar PRO | Legacy Industry |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 12 months |
| Size | 28 MB | 40 MB |
| Requires iOS | **8.0** | 12.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Kehua Data Co.,Ltd.](https://appshunter.io/developer/1118238776) | [Anhui Udan Technology Co., Ltd.](https://appshunter.io/developer/1593792520) |

## What reviewers say

### KF Solar PRO

[App page](https://appshunter.io/ios/app/kf-solar-pro/id1481746574)

**Features:** macOS Compatibility

**In-app purchases:** none


### Legacy Industry

[App page](https://appshunter.io/ios/app/legacy-industry/id6471319635)

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

**In-app purchases:** none


## Frequently asked questions

### Is KF Solar PRO free?

KF Solar PRO is free to download, with no in-app purchases.

### Is Legacy Industry free?

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

### Do KF Solar PRO or Legacy Industry have ads?

Neither KF Solar PRO nor Legacy Industry shows ads.

### Which is updated more often, KF Solar PRO or Legacy Industry?

KF Solar PRO ships an update every 3 weeks, and Legacy Industry every 12 months. Most recently, KF Solar PRO was updated on November 3, 2026 and Legacy Industry on November 7, 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.*