# KOEL iGreen vs Powergen

The clearest difference is iOS requirement: Powergen at 13.0 against KOEL iGreen's 18.0. On price, update cadence, ads and in-app purchases there is nothing between them.

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

KOEL iGreen ships an update monthly, Powergen every 4 weeks. The most recent releases landed on September 25, 2026 and September 27, 2026 respectively.

## The numbers

| Metric | KOEL iGreen | Powergen |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Every 4 weeks** |
| Monetization | Free | — |
| Size | 24 MB | 38 MB |
| Requires iOS | 18.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Tor.ai Limited](https://appshunter.io/developer/1288507527) | [Kirloskar Management Services Private Limited](https://appshunter.io/developer/1882663831) |

## What reviewers say

### KOEL iGreen

[App page](https://appshunter.io/ios/app/koel-igreen/id1481347446)

Monitor machine health, receive critical alarms, and manage preventive maintenance schedules. This app works with a 'Plug and Play' device that connects directly to your machine's harness for real-time data.

**Highlights:** Machine health performance monitoring, Machine alarms and trips alerts, Preventive maintenance scheduling, Plug and Play device integration, Real-time data monitoring

**Features:** macOS Compatibility

**In-app purchases:** none


### Powergen

[App page](https://appshunter.io/ios/app/powergen/id6760104591)

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

**In-app purchases:** none


## Frequently asked questions

### Is KOEL iGreen free?

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

### Is Powergen free?

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

### Do KOEL iGreen or Powergen have ads?

Neither KOEL iGreen nor Powergen shows ads.

### Which is updated more often, KOEL iGreen or Powergen?

KOEL iGreen ships an update monthly, and Powergen every 4 weeks. Most recently, KOEL iGreen was updated on September 25, 2026 and Powergen on September 27, 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.*