# éCO2mix vs EM by SIMAX

éCO2mix and EM by SIMAX are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

éCO2mix ships an update every 2 months, EM by SIMAX every 6 weeks. The most recent releases landed on November 1, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | éCO2mix | EM by SIMAX |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/eco2mix-rte/id424593993/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 33.3% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 6 weeks** |
| Monetization | Free | — |
| Size | 49 MB | 22 MB |
| Requires iOS | **15.1** | 15.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [RTE Reseau de transport d'electricite](https://appshunter.io/developer/424593996) | [Groupe Roederer](https://appshunter.io/developer/1337779396) |

## What reviewers say

### éCO2mix

[App page](https://appshunter.io/ios/app/eco2mix-rte/id424593993)

This app provides real-time insights into the French electrical system, visualizing consumption trends, production sources, and greenhouse gas emissions. It aims to make complex energy data accessible to everyone, fostering better understanding and consumption habits.

**Highlights:** Visualize French electrical system data, Track consumption trends, Analyze production sources, Monitor greenhouse gas emissions, View regional data, Consult European market spot prices

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

**In-app purchases:** none


### EM by SIMAX

[App page](https://appshunter.io/ios/app/em-by-simax/id6745510133)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is éCO2mix free?

éCO2mix is free to download, with no in-app purchases.

### Is EM by SIMAX free?

EM by SIMAX is free to download, with no in-app purchases.

### Do éCO2mix or EM by SIMAX have ads?

Neither éCO2mix nor EM by SIMAX shows ads.

### Which is updated more often, éCO2mix or EM by SIMAX?

éCO2mix ships an update every 2 months, and EM by SIMAX every 6 weeks. Most recently, éCO2mix was updated on November 1, 2026 and EM by SIMAX on October 30, 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.*