# Planetary Clock vs Real Solar System

The clearest difference is price: Real Solar System at Free against Planetary Clock's $0.99. Real Solar System also leads on update cadence (monthly vs every 27 months). Planetary Clock's advantage is iOS requirement (11.4 vs 17.6). On ads, in-app purchases and device support there is nothing between them.

Real Solar System is free to download; Planetary Clock costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Planetary Clock ships an update every 27 months, Real Solar System monthly. The most recent releases landed on August 19, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | Planetary Clock | Real Solar System |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[4.9 (34 ratings)](https://appshunter.io/ios/app/planetary-clock/id812876503/reviews)** | — |
| Number of ratings | **34** | — |
| Positive reviews | 57.1% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 27 months | **Monthly** |
| Monetization | Paid | — |
| Size | 14 MB | 302 MB |
| Requires iOS | **11.4** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Piotr Knapczyk](https://appshunter.io/developer/1541886746) | [Masaya Nagaoka](https://appshunter.io/developer/1698240335) |

## 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


### Real Solar System

[App page](https://appshunter.io/ios/app/real-solar-system/id6475644962)

**In-app purchases:** none


## Frequently asked questions

### Is Planetary Clock free?

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

### Is Real Solar System free?

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

### Do Planetary Clock or Real Solar System have ads?

Neither Planetary Clock nor Real Solar System shows ads.

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

Planetary Clock ships an update every 27 months, and Real Solar System monthly. Most recently, Planetary Clock was updated on August 19, 2026 and Real Solar System on September 20, 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.*