# Solar Coaster vs Astris

The clearest difference is device support: Solar Coaster at 4 against Astris's 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.

Both ship on a similar rhythm, roughly every 3 months. The most recent releases landed on September 22, 2026 and May 16, 2026 respectively.

## The numbers

| Metric | Solar Coaster | Astris |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/solar-coaster/id1218422388/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | Every 3 months |
| Monetization | Free | — |
| Size | 37 MB | 21 MB |
| Requires iOS | **14.0** | 15.0 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Steve Lidie](https://appshunter.io/developer/1869780159) | [ISTITUTI EDMONDO DE AMICIS SRL](https://appshunter.io/developer/1219261025) |

## What reviewers say

### Solar Coaster

[App page](https://appshunter.io/ios/app/solar-coaster/id1218422388)

Visualize the precise movements of the Sun and Moon with 3D graphs, eclipse details, and rise/set times. This app offers offline calculations for celestial positions and moon phases, making it ideal for astronomy enthusiasts.

**Highlights:** 3D movement graphs, Eclipse information and circumstances, Rise and set times, Moon phase and illumination, Offline astronomical data, Local horizontal coordinate system

**Features:** Vision Pro support

**In-app purchases:** none


### Astris

[App page](https://appshunter.io/ios/app/astris/id6454899891)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Solar Coaster free?

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

### Is Astris free?

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

### Do Solar Coaster or Astris have ads?

Neither Solar Coaster nor Astris shows ads.

### Which is updated more often, Solar Coaster or Astris?

Solar Coaster ships an update every 3 months, and Astris every 3 months. Most recently, Solar Coaster was updated on September 22, 2026 and Astris on May 16, 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.*