# KOYOE vs UDAN EMS

The clearest difference is update cadence: KOYOE at fortnightly against UDAN EMS's every 5 weeks. 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.

KOYOE ships an update fortnightly, UDAN EMS every 5 weeks. Both last shipped on November 3, 2026.

## The numbers

| Metric | KOYOE | UDAN EMS |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 5 weeks |
| Monetization | Free | — |
| Size | 47 MB | 34 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Jiangsu Koyoe Energy Technology Co.,Ltd](https://appshunter.io/developer/1501799525) | [Anhui Udan Technology Co., Ltd.](https://appshunter.io/developer/1593792520) |

## What reviewers say

### KOYOE

[App page](https://appshunter.io/ios/app/koyoe/id1501799586)

This platform allows users to centrally monitor, analyze, and display data from power stations. It provides insights into operational status, energy efficiency, and revenue estimation, offering a scientific basis for economic operations and power station design. Real-time communication aids in quick fault diagnosis for safe operation.

**Highlights:** Centralized monitoring of power station data, Analysis of energy efficiency and operation status, Revenue estimation for power stations, Real-time fault information processing, Technical support for safe power station operation

**Features:** Vision Pro support

**In-app purchases:** none


### UDAN EMS

[App page](https://appshunter.io/ios/app/udan-ems/id6467070220)

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

**In-app purchases:** none


## Frequently asked questions

### Is KOYOE free?

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

### Is UDAN EMS free?

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

### Do KOYOE or UDAN EMS have ads?

Neither KOYOE nor UDAN EMS shows ads.

### Which is updated more often, KOYOE or UDAN EMS?

KOYOE ships an update fortnightly, and UDAN EMS every 5 weeks. Most recently, KOYOE was updated on November 3, 2026 and UDAN EMS on November 3, 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.*