# compodif vs Catálogo Messier

The clearest difference is update cadence: compodif at every 3 months against Catálogo Messier's every 11 months. compodif also leads on iOS requirement (12.0 vs 14.0). 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.

compodif ships an update every 3 months, Catálogo Messier every 11 months. The most recent releases landed on September 14, 2026 and May 17, 2026 respectively.

## The numbers

| Metric | compodif | Catálogo Messier |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 11 months |
| Size | 53 MB | 18 MB |
| Requires iOS | **12.0** | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Composants Diffusion](https://appshunter.io/developer/1089863409) | [Pablo Morcillo Perez](https://appshunter.io/developer/922855490) |

## What reviewers say

### compodif

[App page](https://appshunter.io/ios/app/compodif/id1089863410)

**Features:** macOS Compatibility

**In-app purchases:** none


### Catálogo Messier

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

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is compodif free?

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

### Is Catálogo Messier free?

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

### Do compodif or Catálogo Messier have ads?

Neither compodif nor Catálogo Messier shows ads.

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

compodif ships an update every 3 months, and Catálogo Messier every 11 months. Most recently, compodif was updated on September 14, 2026 and Catálogo Messier on May 17, 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.*