# NEOscan vs ASGuide

The clearest difference is review sentiment: ASGuide at 100% against NEOscan's 50%. ASGuide also leads on rating (4.8 vs 2.7) and update cadence (every 4 months vs every 12 months). NEOscan's advantage is device support (3 vs 1) and iOS requirement (8.0 vs 18.0). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ASGuide holds the better App Store score, 4.8 against 2.7. Both are backed by a comparable volume of ratings — 7 and 9 respectively. Written reviews point the same way: 50% of NEOscan's written reviews are positive against 100% of ASGuide's.

NEOscan ships an update every 12 months, ASGuide every 4 months. The most recent releases landed on October 2, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | NEOscan | ASGuide |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.7 (7 ratings)](https://appshunter.io/ios/app/neoscan/id1384305727/reviews) | **[4.8 (9 ratings)](https://appshunter.io/ios/app/asguide/id1500363899/reviews)** |
| Number of ratings | 7 | **9** |
| Positive reviews | 50.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 12 months | **Every 4 months** |
| Monetization | Free | Free |
| Size | 37 MB | 33 MB |
| Requires iOS | **8.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Carlos Anderson](https://appshunter.io/developer/1095157042) | [Philip Perez](https://appshunter.io/developer/1500363898) |

## What reviewers say

### NEOscan

[App page](https://appshunter.io/ios/app/neoscan/id1384305727)

Explore near-Earth objects like asteroids and comets. Visualize their positions relative to Earth and the Moon, and understand their sizes through familiar comparisons. Data is sourced from NASA's Small Body Database.

**Highlights:** Discover asteroids and comets, Filter by type, approach time, distance, and diameter, Earth-Moon model visualization, Size comparison to familiar objects, Data from NASA's Small Body Database

**Features:** macOS Compatibility

**In-app purchases:** none


### 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


## Frequently asked questions

### Is NEOscan free?

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

### Is ASGuide free?

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

### Which has better reviews, NEOscan or ASGuide?

ASGuide is rated higher. NEOscan averages 2.7 out of 5 from 7 ratings, while ASGuide averages 4.8 from 9 ratings.

### Do NEOscan or ASGuide have ads?

Neither NEOscan nor ASGuide shows ads.

### Which is updated more often, NEOscan or ASGuide?

NEOscan ships an update every 12 months, and ASGuide every 4 months. Most recently, NEOscan was updated on October 2, 2026 and ASGuide on October 1, 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.*