# SmartESS vs Hy

The clearest difference is rating: SmartESS at 2.7 against Hy's 1.0. SmartESS also leads on ratings volume (125 vs 1) and update cadence (monthly vs every 3 months). On price, review sentiment, 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.

SmartESS holds the better App Store score, 2.7 against 1.0. That said, the two scores are not equally well evidenced: SmartESS has 125 ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 20% of SmartESS's written reviews are positive against 25% of Hy's, so the app with the better star average is not the one people write more warmly about.

SmartESS ships an update monthly, Hy every 3 months. The most recent releases landed on September 7, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | SmartESS | Hy |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.7 (125 ratings)](https://appshunter.io/ios/app/smartess/id1334656760/reviews)** | [1.0 (1 ratings)](https://appshunter.io/ios/app/hy-power/id6447756193/reviews) |
| Number of ratings | **125** | 1 |
| Positive reviews | 19.7% of reviews | **25.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 3 months |
| Monetization | Free | Free |
| Size | 198 MB | 43 MB |
| Requires iOS | 13.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [祥梯 孟](https://appshunter.io/developer/1070155084) | [Jiangsu Hybrid Energy Technology Co., Ltd](https://appshunter.io/developer/1653244701) |

## What reviewers say

### SmartESS

[App page](https://appshunter.io/ios/app/smartess/id1334656760)

Monitor your energy storage machine's status in real-time with this mobile application. It offers easy-to-understand data visualization, historical data access from anywhere, and displays information in multiple dimensions. The app is designed for efficient data transfer with minimal internet traffic usage.

**Highlights:** Real-time energy storage machine monitoring, Intelligent data visualization, Simple and easy-to-understand charts, Access historical data anytime, anywhere, Multi-dimensional data display, Low internet traffic usage

**Features:** macOS Compatibility

**In-app purchases:** none


### Hy

[App page](https://appshunter.io/ios/app/hy-power/id6447756193)

Monitor and control hybrid energy systems remotely. Access real-time data from PV and ESS systems via the internet and adjust parameters from anywhere.

**Highlights:** Remote data monitoring, Real-time PV & ESS information, Remote control capabilities, Parameter settings, Internet connectivity

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is SmartESS free?

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

### Is Hy free?

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

### Which has better reviews, SmartESS or Hy?

SmartESS is rated higher. SmartESS averages 2.7 out of 5 from 125 ratings, while Hy averages 1.0 from 1 ratings.

### Do SmartESS or Hy have ads?

Neither SmartESS nor Hy shows ads.

### Which is updated more often, SmartESS or Hy?

SmartESS ships an update monthly, and Hy every 3 months. Most recently, SmartESS was updated on September 7, 2026 and Hy on September 9, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*