# Astris vs Solar System Clock

The clearest difference is update cadence: Solar System Clock at every 2 days against Astris's every 3 months. 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.

Astris ships an update every 3 months, Solar System Clock every 2 days. The most recent releases landed on May 16, 2026 and August 15, 2026 respectively.

## The numbers

| Metric | Astris | Solar System Clock |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 days** |
| Size | 21 MB | 5 MB |
| Requires iOS | **15.0** | 16.6 |
| Devices | iPhone, iPod | **iPhone, iPad, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [ISTITUTI EDMONDO DE AMICIS SRL](https://appshunter.io/developer/1219261025) | [Mateusz Andrzejczuk](https://appshunter.io/developer/1158375886) |

## What reviewers say

### Astris

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

**Features:** macOS Compatibility

**In-app purchases:** none


### Solar System Clock

[App page](https://appshunter.io/ios/app/solar-system-clock/id6746730661)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Astris free?

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

### Is Solar System Clock free?

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

### Do Astris or Solar System Clock have ads?

Neither Astris nor Solar System Clock shows ads.

### Which is updated more often, Astris or Solar System Clock?

Astris ships an update every 3 months, and Solar System Clock every 2 days. Most recently, Astris was updated on May 16, 2026 and Solar System Clock on August 15, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*