# RMZ vs Reunionbysat

The clearest difference is price: RMZ at Free against Reunionbysat's $8.99. RMZ also leads on in-app purchases (none vs 4) and iOS requirement (12.0 vs 18.6). Reunionbysat's advantage is update cadence (every 3 days vs every 5 months). On ads and device support there is nothing between them.

RMZ is free to download; Reunionbysat costs $8.99 up front. Reunionbysat sells 4 in-app purchases, starting at $17.99 per month. RMZ asks for nothing beyond the download.

RMZ ships an update every 5 months, Reunionbysat every 3 days. The most recent releases landed on October 5, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | RMZ | Reunionbysat |
| --- | --- | --- |
| Price | **Free** | $8.99 |
| Positive reviews | — | 30.8% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 3 days** |
| Monetization | — | Paid |
| Size | 58 MB | 604 MB |
| Requires iOS | **12.0** | 18.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Alexandre Maillot](https://appshunter.io/developer/1612471404) | [Christophe Georget](https://appshunter.io/developer/1810379857) |

## What reviewers say

### RMZ

[App page](https://appshunter.io/ios/app/rmz/id6479595313)

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

**In-app purchases:** none


### Reunionbysat

[App page](https://appshunter.io/ios/app/reunionbysat/id6744999580)

This app provides real-time data on volcanic activity and local weather for Reunion Island. It features seismic monitoring, interactive maps, advanced navigation, and eruption simulations. Stay informed about safety alerts and environmental conditions.

**Highlights:** Real-time seismic monitoring, Interactive volcanic activity maps, Advanced GPS navigation with trail alerts, Lava flow simulation, High-resolution local weather forecasts, Smart safety and emergency alerts

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Accès Premium 1 mois | $17.99 | per month |
| Accès premium 1 an | $69.99 | per year |
| Accès Données Premium – 1 an | $69.99 | one-time |
| Accès à vie – Données Premium | $89.99 | one-time |


## Frequently asked questions

### Is RMZ free?

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

### Is Reunionbysat free?

Reunionbysat costs $8.99, and also offers in-app purchases.

### Do RMZ or Reunionbysat have ads?

Neither RMZ nor Reunionbysat shows ads.

### Which is updated more often, RMZ or Reunionbysat?

RMZ ships an update every 5 months, and Reunionbysat every 3 days. Most recently, RMZ was updated on October 5, 2026 and Reunionbysat on October 24, 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.*