# éCO2mix vs REXFFA

The clearest difference is update cadence: REXFFA at fortnightly against éCO2mix's monthly. REXFFA also leads on iOS requirement (13.4 vs 15.1). 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.

éCO2mix ships an update monthly, REXFFA fortnightly. The most recent releases landed on October 10, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | éCO2mix | REXFFA |
| --- | --- | --- |
| 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 | Monthly | **Fortnightly** |
| Monetization | Free | — |
| Size | 48 MB | 26 MB |
| Requires iOS | 15.1 | **13.4** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [RTE Reseau de transport d'electricite](https://appshunter.io/developer/424593996) | [REXFFA](https://appshunter.io/developer/1759373244) |

## 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


### REXFFA

[App page](https://appshunter.io/ios/app/rexffa/id6575384929)

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

**In-app purchases:** none


## Frequently asked questions

### Is éCO2mix free?

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

### Is REXFFA free?

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

### Do éCO2mix or REXFFA have ads?

Neither éCO2mix nor REXFFA shows ads.

### Which is updated more often, éCO2mix or REXFFA?

éCO2mix ships an update monthly, and REXFFA fortnightly. Most recently, éCO2mix was updated on October 10, 2026 and REXFFA on October 2, 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.*