# Solar Aircon vs EG4 BMS

The clearest difference is update cadence: EG4 BMS at every 3 days against Solar Aircon's every 20 months. 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.

Solar Aircon ships an update every 20 months, EG4 BMS every 3 days. The most recent releases landed on November 7, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Solar Aircon | EG4 BMS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (59 ratings)](https://appshunter.io/ios/app/solar-aircon/id1503114509/reviews)** | — |
| Number of ratings | **59** | — |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 20 months | **Every 3 days** |
| Monetization | Free | — |
| Size | 165 MB | 44 MB |
| Requires iOS | 11.0 | 11.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Zhejiang Deye Electrical Appliances Co., Ltd.](https://appshunter.io/developer/1332604988) | [eg4](https://appshunter.io/developer/1858965001) |

## 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 BMS

[App page](https://appshunter.io/ios/app/eg4-bms/id6758079727)

**In-app purchases:** none


## Frequently asked questions

### Is Solar Aircon free?

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

### Is EG4 BMS free?

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

### Do Solar Aircon or EG4 BMS have ads?

Neither Solar Aircon nor EG4 BMS shows ads.

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

Solar Aircon ships an update every 20 months, and EG4 BMS every 3 days. Most recently, Solar Aircon was updated on November 7, 2026 and EG4 BMS on October 28, 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.*