# Armillary vs MessierMate

The clearest difference is update cadence: Armillary at daily against MessierMate's monthly. 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.

Armillary ships an update daily, MessierMate monthly. The most recent releases landed on October 15, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | Armillary | MessierMate |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (3 ratings)](https://appshunter.io/ios/app/messiermate-night-sky-tracker/id6782169332/reviews)** |
| Number of ratings | — | **3** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Daily** | Monthly |
| Monetization | — | Free |
| Size | 13 MB | 70 MB |
| Requires iOS | 17.0 | **16.4** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [晗 林](https://appshunter.io/developer/1768801333) | [CosmicFlow Labs LLC](https://appshunter.io/developer/1882544353) |

## What reviewers say

### Armillary

[App page](https://appshunter.io/ios/app/armillary/id6761231094)

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

**In-app purchases:** none


### MessierMate

[App page](https://appshunter.io/ios/app/messiermate-night-sky-tracker/id6782169332)

This free astronomy app helps deep-sky observers track celestial objects. It shows what's visible in your sky tonight, sorted by urgency, and allows you to plan future observing sessions and log your observations. It features a dark theme and red night mode for preserving night vision.

**Highlights:** Track 110 Messier objects, Real-time altitude and azimuth, Urgency-based object sorting, Monthly planning calendar, Session logging with notes and photos, Offline functionality, Red Night mode

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

**In-app purchases:** none


## Frequently asked questions

### Is Armillary free?

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

### Is MessierMate free?

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

### Do Armillary or MessierMate have ads?

Neither Armillary nor MessierMate shows ads.

### Which is updated more often, Armillary or MessierMate?

Armillary ships an update daily, and MessierMate monthly. Most recently, Armillary was updated on October 15, 2026 and MessierMate on October 21, 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.*