# Planetary Clock vs Constellation Finder

The clearest difference is price: Constellation Finder at Free against Planetary Clock's $0.99. Constellation Finder also leads on review sentiment (100% vs 57%) and update cadence (every 2 months vs every 27 months). Planetary Clock's advantage is rating (4.9 vs 4.4) and in-app purchases (none vs 5). On ratings volume and ads there is nothing between them.

Constellation Finder is free to download; Planetary Clock costs $0.99 up front. Constellation Finder sells 5 in-app purchases, starting at $4.99 per 7 days. Planetary Clock asks for nothing beyond the download.

Planetary Clock holds the better App Store score, 4.9 against 4.4. Both are backed by a comparable volume of ratings — 34 and 21 respectively. Written reviews complicate that: 57% of Planetary Clock's written reviews are positive against 100% of Constellation Finder's, so the app with the better star average is not the one people write more warmly about.

Planetary Clock ships an update every 27 months, Constellation Finder every 2 months. The most recent releases landed on October 16, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Planetary Clock | Constellation Finder |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[4.9 (34 ratings)](https://appshunter.io/ios/app/planetary-clock/id812876503/reviews)** | [4.4 (21 ratings)](https://appshunter.io/ios/app/constellation-finder-planets/id6744271218/reviews) |
| Number of ratings | **34** | 21 |
| Positive reviews | 57.1% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 27 months | **Every 2 months** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 14 MB | 20 MB |
| Requires iOS | **11.4** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 9+ |
| Developer | [Piotr Knapczyk](https://appshunter.io/developer/1541886746) | [Overflow LTD](https://appshunter.io/developer/1664238457) |

## What reviewers say

### Planetary Clock

[App page](https://appshunter.io/ios/app/planetary-clock/id812876503)

Visualize the precise positions of all planets in the Solar System for any given day. It uses accurate NASA data for orbital calculations and relative planet sizing, offering a clear, educational view of celestial mechanics.

**Highlights:** Real-time planet positions, Accurate orbital calculations, Uses NASA data, Relative planet sizing, Educational solar system view

**Features:** macOS Compatibility

**In-app purchases:** none


### Constellation Finder

[App page](https://appshunter.io/ios/app/constellation-finder-planets/id6744271218)

Discover planets and constellations with an interactive and educational journey through space. Explore celestial bodies, learn fascinating facts, and enjoy a playful design that makes learning about the solar system fun for all ages.

**Highlights:** Instant planet search and navigation, Fascinating facts and real data, Interactive solar system exploration, Regularly updated celestial data, Vibrant and playful design, Constellation finding capabilities

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $4.99 | per 7 days |
| Monthly | $5.99 | per month |
| Yearly | $19.99 | per year |
| Lifetime | $17.99 | one-time |
| Lifetime | $29.99 | one-time |


## Frequently asked questions

### Is Planetary Clock free?

Planetary Clock costs $0.99, with no in-app purchases.

### Is Constellation Finder free?

Constellation Finder is free to download, with in-app purchases available.

### Which has better reviews, Planetary Clock or Constellation Finder?

Planetary Clock is rated higher. Planetary Clock averages 4.9 out of 5 from 34 ratings, while Constellation Finder averages 4.4 from 21 ratings.

### Do Planetary Clock or Constellation Finder have ads?

Neither Planetary Clock nor Constellation Finder shows ads.

### Which is updated more often, Planetary Clock or Constellation Finder?

Planetary Clock ships an update every 27 months, and Constellation Finder every 2 months. Most recently, Planetary Clock was updated on October 16, 2026 and Constellation Finder on October 12, 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.*