# ASGuide vs Messier Finder Charts

The clearest difference is price: ASGuide at Free against Messier Finder Charts's $0.99. ASGuide also leads on update cadence (every 4 months vs every 41 months) and iOS requirement (18.0 vs 26.2). On ads, in-app purchases and device support there is nothing between them.

ASGuide is free to download; Messier Finder Charts costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ASGuide ships an update every 4 months, Messier Finder Charts every 41 months. The most recent releases landed on October 24, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | ASGuide | Messier Finder Charts |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | **[4.8 (9 ratings)](https://appshunter.io/ios/app/asguide/id1500363899/reviews)** | — |
| Number of ratings | **9** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 41 months |
| Monetization | Free | — |
| Size | 33 MB | 5 MB |
| Requires iOS | **18.0** | 26.2 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Philip Perez](https://appshunter.io/developer/1500363898) | [David Lent](https://appshunter.io/developer/490531833) |

## What reviewers say

### ASGuide

[App page](https://appshunter.io/ios/app/asguide/id1500363899)

Explore the night sky with this astronomy companion. Discover planets, galaxies, nebulae, and more visible from your location. Generate custom viewing lists and preview celestial objects with an interactive sky atlas.

**Highlights:** Discover celestial objects visible from your location, Generate custom viewing lists, View detailed observation information, Interactive sky atlas preview, Dark mode for nighttime viewing, Sunrise/sunset and moon phase dashboard

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

**In-app purchases:** none


### Messier Finder Charts

[App page](https://appshunter.io/ios/app/messier-finder-charts/id1663416474)

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

**In-app purchases:** none


## Frequently asked questions

### Is ASGuide free?

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

### Is Messier Finder Charts free?

Messier Finder Charts costs $0.99, with no in-app purchases.

### Do ASGuide or Messier Finder Charts have ads?

Neither ASGuide nor Messier Finder Charts shows ads.

### Which is updated more often, ASGuide or Messier Finder Charts?

ASGuide ships an update every 4 months, and Messier Finder Charts every 41 months. Most recently, ASGuide was updated on October 24, 2026 and Messier Finder Charts on October 20, 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.*