# iEMS vs EstorageOM

The clearest difference is update cadence: EstorageOM at every 2 months against iEMS's every 4 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.

iEMS ships an update every 4 months, EstorageOM every 2 months. The most recent releases landed on October 20, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | iEMS | EstorageOM |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/estorageom/id6471364799/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 months** |
| Monetization | — | Free |
| Size | 41 MB | 40 MB |
| Requires iOS | 13.0 | **12.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Shenzhen ZTE Software Co., Ltd.](https://appshunter.io/developer/1863573894) | [阿特斯储能科技有限公司](https://appshunter.io/developer/1715176793) |

## What reviewers say

### iEMS

[App page](https://appshunter.io/ios/app/iems/id6450133373)

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

**In-app purchases:** none


### EstorageOM

[App page](https://appshunter.io/ios/app/estorageom/id6471364799)

Optimize your energy usage with real-time monitoring of photovoltaic and energy storage systems. This app helps you manage power more intelligently, track energy storage status, and reduce overall energy expenses for a more efficient home or business.

**Highlights:** Real-time energy utilization monitoring, Photovoltaic system tracking, Energy storage system monitoring, Intelligent power management, Energy expense reduction

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

**In-app purchases:** none


## Frequently asked questions

### Is iEMS free?

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

### Is EstorageOM free?

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

### Do iEMS or EstorageOM have ads?

Neither iEMS nor EstorageOM shows ads.

### Which is updated more often, iEMS or EstorageOM?

iEMS ships an update every 4 months, and EstorageOM every 2 months. Most recently, iEMS was updated on October 20, 2026 and EstorageOM on October 22, 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.*