# Catálogo Messier vs Castomètre

The clearest difference is update cadence: Castomètre at every 3 weeks against Catálogo Messier's every 9 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.

Catálogo Messier ships an update every 9 months, Castomètre every 3 weeks. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Catálogo Messier | Castomètre |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 3 weeks** |
| Size | 19 MB | 4 MB |
| Requires iOS | **15.6** | 16.2 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Pablo Morcillo Perez](https://appshunter.io/developer/922855490) | [CASTORAMA FRANCE](https://appshunter.io/developer/353499905) |

## What reviewers say

### Catálogo Messier

[App page](https://appshunter.io/ios/app/catalogo-messier/id6443842540)

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

**In-app purchases:** none


### Castomètre

[App page](https://appshunter.io/ios/app/castometre/id6760836501)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Catálogo Messier free?

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

### Is Castomètre free?

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

### Do Catálogo Messier or Castomètre have ads?

Neither Catálogo Messier nor Castomètre shows ads.

### Which is updated more often, Catálogo Messier or Castomètre?

Catálogo Messier ships an update every 9 months, and Castomètre every 3 weeks. Most recently, Catálogo Messier was updated on November 3, 2026 and Castomètre on October 31, 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.*