# Lunar X vs CatalogueMessier

The clearest difference is price: Lunar X at Free against CatalogueMessier's $0.99. Lunar X also leads on iOS requirement (14.1 vs 17.0). On update cadence, ads, in-app purchases and device support there is nothing between them.

Lunar X is free to download; CatalogueMessier costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Lunar X ships an update every 5 weeks, CatalogueMessier every 3 weeks. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Lunar X | CatalogueMessier |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 3 weeks** |
| Monetization | — | Paid |
| Size | 4 MB | 9 MB |
| Requires iOS | **14.1** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Claude Duplessis](https://appshunter.io/developer/1591450006) | [Laurent DURLIAT](https://appshunter.io/developer/1796721727) |

## What reviewers say

### Lunar X

[App page](https://appshunter.io/ios/app/lunar-x/id1591450004)

**Features:** Vision Pro support

**In-app purchases:** none


### CatalogueMessier

[App page](https://appshunter.io/ios/app/cataloguemessier/id6747948514)

Explore the Messier, NGC, and Caldwell astronomical catalogs. Log your observations with photos, filter celestial objects by type, and track your progress with detailed statistics. Export your data for further analysis.

**Highlights:** View Messier, NGC, and Caldwell catalogs, Add observation photos, Filter objects by category, Track observation progress, Export observation data, Multi-language support

**In-app purchases:** none


## Frequently asked questions

### Is Lunar X free?

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

### Is CatalogueMessier free?

CatalogueMessier costs $0.99, with no in-app purchases.

### Do Lunar X or CatalogueMessier have ads?

Neither Lunar X nor CatalogueMessier shows ads.

### Which is updated more often, Lunar X or CatalogueMessier?

Lunar X ships an update every 5 weeks, and CatalogueMessier every 3 weeks. Most recently, Lunar X was updated on November 3, 2026 and CatalogueMessier on October 30, 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.*