# CST Energy vs SRNE PRO

The clearest difference is update cadence: SRNE PRO at every 2 days against CST Energy's every 4 months. SRNE PRO also leads on device support (4 vs 2). CST Energy's advantage is iOS requirement (12.0 vs 15.0). On price, ads and in-app purchases there is nothing between them.

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

CST Energy ships an update every 4 months, SRNE PRO every 2 days. Both last shipped on October 24, 2026.

## The numbers

| Metric | CST Energy | SRNE PRO |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 days** |
| Size | 34 MB | 84 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 4+ | 17+ |
| Developer | [亘能科技有限公司](https://appshunter.io/developer/1764914977) | [SRNE Solar Co.,Ltd](https://appshunter.io/developer/1479797802) |

## What reviewers say

### CST Energy

[App page](https://appshunter.io/ios/app/cst-energy/id6667113293)

**Features:** macOS Compatibility

**In-app purchases:** none


### SRNE PRO

[App page](https://appshunter.io/ios/app/srne-pro/id6792165002)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is CST Energy free?

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

### Is SRNE PRO free?

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

### Do CST Energy or SRNE PRO have ads?

Neither CST Energy nor SRNE PRO shows ads.

### Which is updated more often, CST Energy or SRNE PRO?

CST Energy ships an update every 4 months, and SRNE PRO every 2 days. Most recently, CST Energy was updated on October 24, 2026 and SRNE PRO 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.*