# Planetary Clock vs SystemeSolaire

The clearest difference is update cadence: Planetary Clock at every 27 months against SystemeSolaire's every 55 months. Planetary Clock also leads on price ($0.99 vs $1.99) and iOS requirement (11.4 vs 15.6). On ads, in-app purchases and device support there is nothing between them.

Planetary Clock costs $0.99 and SystemeSolaire $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Planetary Clock ships an update every 27 months, SystemeSolaire every 55 months. The most recent releases landed on November 1, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Planetary Clock | SystemeSolaire |
| --- | --- | --- |
| Price | **$0.99** | $1.99 |
| Rating | **[4.8 (37 ratings)](https://appshunter.io/ios/app/planetary-clock/id812876503/reviews)** | — |
| Number of ratings | **37** | — |
| Positive reviews | 57.1% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 27 months** | Every 55 months |
| Monetization | Paid | — |
| Size | 14 MB | 596 MB |
| Requires iOS | **11.4** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Piotr Knapczyk](https://appshunter.io/developer/1541886746) | [NMS Narcisse Mavoha Solutions Sarl](https://appshunter.io/developer/963941606) |

## 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


### SystemeSolaire

[App page](https://appshunter.io/ios/app/systemesolaire/id1440418549)

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

**In-app purchases:** none


## Frequently asked questions

### Is Planetary Clock free?

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

### Is SystemeSolaire free?

SystemeSolaire costs $1.99, with no in-app purchases.

### Do Planetary Clock or SystemeSolaire have ads?

Neither Planetary Clock nor SystemeSolaire shows ads.

### Which is updated more often, Planetary Clock or SystemeSolaire?

Planetary Clock ships an update every 27 months, and SystemeSolaire every 55 months. Most recently, Planetary Clock was updated on November 1, 2026 and SystemeSolaire on October 28, 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.*