# SpaceNerd vs Sky Clock

The clearest difference is in-app purchases: SpaceNerd at none against Sky Clock's 3. SpaceNerd also leads on rating (5.0 vs 4.7) and update cadence (every 4 days vs weekly). Sky Clock's advantage is ratings volume (3 vs 1). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Sky Clock sells 3 in-app purchases, starting at $6.99 per month. SpaceNerd asks for nothing beyond the download.

SpaceNerd holds the better App Store score, 5.0 against 4.7. Both are backed by a comparable volume of ratings — 1 and 3 respectively.

SpaceNerd ships an update every 4 days, Sky Clock weekly. The most recent releases landed on October 24, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | SpaceNerd | Sky Clock |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/spacenerd/id6760432915/reviews)** | [4.7 (3 ratings)](https://appshunter.io/ios/app/sky-clock-star-map-and-aurora/id6799441003/reviews) |
| Number of ratings | 1 | **3** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 4 days** | Weekly |
| Monetization | **Free** | Freemium |
| Size | 76 MB | 22 MB |
| Requires iOS | 17.6 | **17.0** |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Dan Lazarescou](https://appshunter.io/developer/1884447939) | [Eric Rosenbaum](https://appshunter.io/developer/1863501852) |

## What reviewers say

### SpaceNerd

[App page](https://appshunter.io/ios/app/spacenerd/id6760432915)

Identify celestial bodies and learn stargazing with this app that uses your device's sensors. Explore constellations, planets, and deep-sky objects, even in daylight or through clouds. It offers guidance modes and a fun game to test your skills.

**Highlights:** Identify stars and planets, Live guidance to celestial objects, Constellation search and navigation, Offline astronomical catalog, Daylight and cloud-friendly stargazing, Interactive astronomy game

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

**In-app purchases:** none


### Sky Clock

[App page](https://appshunter.io/ios/app/sky-clock-star-map-and-aurora/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 (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Sky Clock Plus, Monthly | $6.99 | per month |
| Sky Clock Plus, Yearly | $44.99 | per year |
| Plus Forever | $89.99 | one-time |


## Frequently asked questions

### Is SpaceNerd free?

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

### Is Sky Clock free?

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

### Which has better reviews, SpaceNerd or Sky Clock?

SpaceNerd is rated higher. SpaceNerd averages 5.0 out of 5 from 1 ratings, while Sky Clock averages 4.7 from 3 ratings.

### Do SpaceNerd or Sky Clock have ads?

Neither SpaceNerd nor Sky Clock shows ads.

### Which is updated more often, SpaceNerd or Sky Clock?

SpaceNerd ships an update every 4 days, and Sky Clock weekly. Most recently, SpaceNerd was updated on October 24, 2026 and Sky Clock on October 29, 2026.

---

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