# Catálogo Messier vs SUNSCAN

The clearest difference is update cadence: SUNSCAN at every 9 days against Catálogo Messier's every 11 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 11 months, SUNSCAN every 9 days. The most recent releases landed on May 17, 2026 and September 11, 2026 respectively.

## The numbers

| Metric | Catálogo Messier | SUNSCAN |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 11 months | **Every 9 days** |
| Size | 18 MB | 47 MB |
| Requires iOS | **14.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 9+ |
| Developer | [Pablo Morcillo Perez](https://appshunter.io/developer/922855490) | [STAROS](https://appshunter.io/developer/1768267881) |

## What reviewers say

### Catálogo Messier

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

**Features:** macOS Compatibility

**In-app purchases:** none


### SUNSCAN

[App page](https://appshunter.io/ios/app/sunscan/id6680193688)

**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 SUNSCAN free?

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

### Do Catálogo Messier or SUNSCAN have ads?

Neither Catálogo Messier nor SUNSCAN shows ads.

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

Catálogo Messier ships an update every 11 months, and SUNSCAN every 9 days. Most recently, Catálogo Messier was updated on May 17, 2026 and SUNSCAN on September 11, 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.*