# Constellation88 vs Sky Clock

The clearest difference is in-app purchases: Constellation88 at none against Sky Clock's 2. On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Sky Clock sells 2 in-app purchases, starting at $6.99 per month. Constellation88 asks for nothing beyond the download.

## The numbers

| Metric | Constellation88 | Sky Clock |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.7 (3 ratings)](https://appshunter.io/ios/app/sky-clock-stargazing-forecast/id6799441003/reviews)** |
| Number of ratings | — | **3** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Weekly |
| Monetization | — | Freemium |
| Size | 10 MB | 12 MB |
| Requires iOS | 18.0 | **17.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [One Choi](https://appshunter.io/developer/1874544855) | [Eric Rosenbaum](https://appshunter.io/developer/1863501852) |

## What reviewers say

### Constellation88

[App page](https://appshunter.io/ios/app/constellation88/id6758706710)

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

**In-app purchases:** none


### Sky Clock

[App page](https://appshunter.io/ios/app/sky-clock-stargazing-forecast/id6799441003)

Identify celestial objects and events visible from your location. Get real-time sky maps, ISS pass predictions, and forecasts for meteor showers and planetary alignments. Works offline without ads or accounts.

**Highlights:** Interactive star and planet map, ISS pass predictions, Meteor shower and conjunction forecasts, Offline functionality, Stargazing log, Customizable alerts

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Sky Clock Plus, Monthly | $6.99 | per month |
| Sky Clock Plus, Yearly | $44.99 | per year |


## Frequently asked questions

### Is Constellation88 free?

Constellation88 is free to download, with no in-app purchases.

### Is Sky Clock free?

Sky Clock is free to download, with in-app purchases available.

### Do Constellation88 or Sky Clock have ads?

Neither Constellation88 nor Sky Clock shows ads.

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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.*