# Solar Aircon vs EG4

The clearest difference is rating: Solar Aircon at 4.0 against EG4's 2.3. Solar Aircon also leads on review sentiment (67% vs 25%) and ratings volume (58 vs 12). EG4's advantage is update cadence (every 3 weeks vs every 20 months). On price, ads, in-app purchases and monetization model there is nothing between them.

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

Solar Aircon holds the better App Store score, 4.0 against 2.3. Both are backed by a comparable volume of ratings — 58 and 12 respectively. Written reviews point the same way: 67% of Solar Aircon's written reviews are positive against 25% of EG4's.

Solar Aircon ships an update every 20 months, EG4 every 3 weeks. The most recent releases landed on October 24, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | Solar Aircon | EG4 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (58 ratings)](https://appshunter.io/ios/app/solar-aircon/id1503114509/reviews)** | [2.3 (12 ratings)](https://appshunter.io/ios/app/eg4/id1571511617/reviews) |
| Number of ratings | **58** | 12 |
| Positive reviews | **66.7% of reviews** | 25.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 20 months | **Every 3 weeks** |
| Monetization | Free | Free |
| Size | 165 MB | 10 MB |
| Requires iOS | **11.0** | 14.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Zhejiang Deye Electrical Appliances Co., Ltd.](https://appshunter.io/developer/1332604988) | [琼莉 吴](https://appshunter.io/developer/1741032172) |

## What reviewers say

### Solar Aircon

[App page](https://appshunter.io/ios/app/solar-aircon/id1503114509)

Monitor your air conditioner's power saving capabilities, with potential savings of 50%-100% during daytime hours. Remotely control your AC unit from any location and set timers for automated operation.

**Highlights:** Check power saving status, Remote AC control, Set operational timers, Monitor daytime energy savings

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

**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 Solar Aircon free?

Solar Aircon 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, Solar Aircon or EG4?

Solar Aircon is rated higher. Solar Aircon averages 4.0 out of 5 from 58 ratings, while EG4 averages 2.3 from 12 ratings.

### Do Solar Aircon or EG4 have ads?

Neither Solar Aircon nor EG4 shows ads.

### Which is updated more often, Solar Aircon or EG4?

Solar Aircon ships an update every 20 months, and EG4 every 3 weeks. Most recently, Solar Aircon was updated on October 24, 2026 and EG4 on October 20, 2026.

---

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