# SmartESS vs EG4

The clearest difference is rating: SmartESS at 2.7 against EG4's 2.3. SmartESS also leads on ratings volume (125 vs 12). On price, review sentiment, update cadence and ads 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 2.3. That said, the two scores are not equally well evidenced: SmartESS has 125 ratings behind it against 12, 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 EG4's, so the app with the better star average is not the one people write more warmly about.

SmartESS ships an update monthly, EG4 every 3 weeks. The most recent releases landed on October 13, 2026 and September 16, 2026 respectively.

## The numbers

| Metric | SmartESS | EG4 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.7 (125 ratings)](https://appshunter.io/ios/app/smartess/id1334656760/reviews)** | [2.3 (12 ratings)](https://appshunter.io/ios/app/eg4/id1571511617/reviews) |
| Number of ratings | **125** | 12 |
| Positive reviews | 19.7% of reviews | **25.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Every 3 weeks** |
| Monetization | Free | Free |
| Size | 198 MB | 10 MB |
| Requires iOS | **13.0** | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [祥梯 孟](https://appshunter.io/developer/1070155084) | [琼莉 吴](https://appshunter.io/developer/1741032172) |

## 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


### EG4

[App page](https://appshunter.io/ios/app/eg4/id1571511617)

This utility app monitors your device's battery health in real-time. It displays key metrics such as current, temperature, and voltage via Bluetooth connection. Keep track of your battery's vital signs to ensure optimal performance.

**Highlights:** Monitor battery health, Display current, temperature, voltage, Bluetooth connectivity, Real-time status updates, Device compatibility for iPhone/iPad

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is SmartESS free?

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

### Is EG4 free?

EG4 is free to download, with no in-app purchases.

### Which has better reviews, SmartESS or EG4?

SmartESS is rated higher. SmartESS averages 2.7 out of 5 from 125 ratings, while EG4 averages 2.3 from 12 ratings.

### Do SmartESS or EG4 have ads?

Neither SmartESS nor EG4 shows ads.

### Which is updated more often, SmartESS or EG4?

SmartESS ships an update monthly, and EG4 every 3 weeks. Most recently, SmartESS was updated on October 13, 2026 and EG4 on September 16, 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.*