# CatalogueMessier vs UnivMap

The clearest difference is price: UnivMap at Free against CatalogueMessier's $0.99. UnivMap also leads on iOS requirement (15.0 vs 17.0). On update cadence, ads, in-app purchases and device support there is nothing between them.

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

CatalogueMessier ships an update every 3 weeks, UnivMap fortnightly. The most recent releases landed on November 5, 2026 and November 10, 2026 respectively.

## The numbers

| Metric | CatalogueMessier | UnivMap |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Fortnightly** |
| Monetization | Paid | — |
| Size | 9 MB | 32 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Laurent DURLIAT](https://appshunter.io/developer/1796721727) | [宇輝資訊有限公司](https://appshunter.io/developer/1888426874) |

## What reviewers say

### 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


### UnivMap

[App page](https://appshunter.io/ios/app/univmap/id6806794531)

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

**In-app purchases:** none


## Frequently asked questions

### Is CatalogueMessier free?

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

### Is UnivMap free?

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

### Do CatalogueMessier or UnivMap have ads?

Neither CatalogueMessier nor UnivMap shows ads.

### Which is updated more often, CatalogueMessier or UnivMap?

CatalogueMessier ships an update every 3 weeks, and UnivMap fortnightly. Most recently, CatalogueMessier was updated on November 5, 2026 and UnivMap on November 10, 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.*