# SystemeSolaire vs Universe Size Comparison

The clearest difference is update cadence: Universe Size Comparison at every 3 months against SystemeSolaire's every 55 months. SystemeSolaire's advantage is iOS requirement (15.6 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.

SystemeSolaire costs $1.99 and Universe Size Comparison $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

SystemeSolaire ships an update every 55 months, Universe Size Comparison every 3 months. The most recent releases landed on October 28, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | SystemeSolaire | Universe Size Comparison |
| --- | --- | --- |
| Price | $1.99 | $1.99 |
| Rating | — | **[3.2 (30 ratings)](https://appshunter.io/ios/app/universe-size-comparison/id1473946290/reviews)** |
| Number of ratings | — | **30** |
| Positive reviews | — | 70.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 55 months | **Every 3 months** |
| Monetization | — | Paid |
| Size | 596 MB | 411 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple TV |
| Age rating | 4+ | +4 |
| Developer | [NMS Narcisse Mavoha Solutions Sarl](https://appshunter.io/developer/963941606) | [Daniele Citi](https://appshunter.io/developer/1187632258) |

## What reviewers say

### SystemeSolaire

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

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

**In-app purchases:** none


### Universe Size Comparison

[App page](https://appshunter.io/ios/app/universe-size-comparison/id1473946290)

Explore the vastness of space and understand celestial body dimensions through interactive 3D comparisons. Discover the scale of planets and stars, from our Sun to hypergiant stars, with guided tours and free comparison modes.

**Highlights:** 3D astronomical comparisons, Tour Mode with guided explanations, Free Mode for custom comparisons, Scale comparisons of planets and stars, Detailed celestial body information, Elegant user interface

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

**In-app purchases:** none


## Frequently asked questions

### Is SystemeSolaire free?

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

### Is Universe Size Comparison free?

Universe Size Comparison costs $1.99, with no in-app purchases.

### Do SystemeSolaire or Universe Size Comparison have ads?

Neither SystemeSolaire nor Universe Size Comparison shows ads.

### Which is updated more often, SystemeSolaire or Universe Size Comparison?

SystemeSolaire ships an update every 55 months, and Universe Size Comparison every 3 months. Most recently, SystemeSolaire was updated on October 28, 2026 and Universe Size Comparison on November 3, 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.*