# LigneAlerte vs EM by SIMAX

The clearest difference is update cadence: EM by SIMAX at every 6 weeks against LigneAlerte's every 3 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.

LigneAlerte ships an update every 3 months, EM by SIMAX every 6 weeks. The most recent releases landed on October 24, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | LigneAlerte | EM by SIMAX |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 6 weeks** |
| Monetization | Free | — |
| Size | 69 MB | 22 MB |
| Requires iOS | **14.0** | 15.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [ENEDIS](https://appshunter.io/developer/885458979) | [Groupe Roederer](https://appshunter.io/developer/1337779396) |

## What reviewers say

### LigneAlerte

[App page](https://appshunter.io/ios/app/lignealerte/id1559062129)

This app uses GPS to alert you when you are near overhead power lines. It provides customizable sound, light, and vibration alerts based on your proximity to the electrical network. The app downloads local network data upon first use and operates without requiring an account or collecting user data.

**Highlights:** GPS-based proximity alerts, Customizable sound alerts, Visual flash alerts, Vibration alerts, Offline network map download, No account required

**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 LigneAlerte free?

LigneAlerte 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 LigneAlerte or EM by SIMAX have ads?

Neither LigneAlerte nor EM by SIMAX shows ads.

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

LigneAlerte ships an update every 3 months, and EM by SIMAX every 6 weeks. Most recently, LigneAlerte was updated on October 24, 2026 and EM by SIMAX on October 28, 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.*