# Chandra 20 Years & Beyond vs ASGuide

The clearest difference is rating: Chandra 20 Years & Beyond at 5.0 against ASGuide's 4.8. Chandra 20 Years & Beyond also leads on device support (3 vs 1) and iOS requirement (9.0 vs 18.0). ASGuide's advantage is ratings volume (9 vs 2). On price, update cadence, 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.

Chandra 20 Years & Beyond holds the better App Store score, 5.0 against 4.8. Both are backed by a comparable volume of ratings — 2 and 9 respectively.

Both ship on a similar rhythm, roughly every 4 months. The most recent releases landed on October 29, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Chandra 20 Years & Beyond | ASGuide |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/chandra-20-years-and-beyond/id1476074967/reviews)** | [4.8 (9 ratings)](https://appshunter.io/ios/app/asguide/id1500363899/reviews) |
| Number of ratings | 2 | **9** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | Every 4 months |
| Monetization | Free | Free |
| Size | 98 MB | 33 MB |
| Requires iOS | **9.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Smithsonian Institution](https://appshunter.io/developer/370564865) | [Philip Perez](https://appshunter.io/developer/1500363898) |

## What reviewers say

### Chandra 20 Years & Beyond

[App page](https://appshunter.io/ios/app/chandra-20-years-and-beyond/id1476074967)

Explore two decades of cosmic discoveries with this image explorer. View composite, X-ray, and optical wavelengths of wondrous objects, watch films, and zoom into detailed images. Future updates promise more insights into the universe's mysteries.

**Highlights:** Explore cosmic objects across wavelengths, View 11 photo albums, Watch Chandra films, Zoom into detailed images, Share images, Read object captions

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

**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 Chandra 20 Years & Beyond free?

Chandra 20 Years & Beyond 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, Chandra 20 Years & Beyond or ASGuide?

Chandra 20 Years & Beyond is rated higher. Chandra 20 Years & Beyond averages 5.0 out of 5 from 2 ratings, while ASGuide averages 4.8 from 9 ratings.

### Do Chandra 20 Years & Beyond or ASGuide have ads?

Neither Chandra 20 Years & Beyond nor ASGuide shows ads.

### Which is updated more often, Chandra 20 Years & Beyond or ASGuide?

Chandra 20 Years & Beyond ships an update every 4 months, and ASGuide every 4 months. Most recently, Chandra 20 Years & Beyond was updated on October 29, 2026 and ASGuide on October 24, 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.*