# Interactive Minds Solar System vs Universe Size Comparison

The clearest difference is rating: Interactive Minds Solar System at 5.0 against Universe Size Comparison's 3.1. Interactive Minds Solar System also leads on iOS requirement (8.0 vs 17.0). Universe Size Comparison's advantage is ratings volume (29 vs 6) and device support (3 vs 1). On review sentiment, update cadence, ads and in-app purchases there is nothing between them.

Interactive Minds Solar System costs $2.99 and Universe Size Comparison $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Interactive Minds Solar System holds the better App Store score, 5.0 against 3.1. Both are backed by a comparable volume of ratings — 6 and 29 respectively. Written reviews split almost evenly too, at 70% and 70% positive.

Interactive Minds Solar System ships an update every 2 months, Universe Size Comparison every 4 months. The most recent releases landed on October 21, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Interactive Minds Solar System | Universe Size Comparison |
| --- | --- | --- |
| Price | $2.99 | **$1.99** |
| Rating | **[5.0 (6 ratings)](https://appshunter.io/ios/app/interactive-minds-solar-system/id578659268/reviews)** | [3.1 (29 ratings)](https://appshunter.io/ios/app/universe-size-comparison/id1473946290/reviews) |
| Number of ratings | 6 | **29** |
| Positive reviews | **70.4% of reviews** | 70.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 4 months |
| Monetization | Paid | Paid |
| Size | 126 MB | 413 MB |
| Requires iOS | **8.0** | 17.0 |
| Devices | iPad | **iPhone, iPad, Apple TV** |
| Age rating | 4+ | +4 |
| Developer | [Vosonos LLC](https://appshunter.io/developer/578659631) | [Daniele Citi](https://appshunter.io/developer/1187632258) |

## What reviewers say

### Interactive Minds Solar System

[App page](https://appshunter.io/ios/app/interactive-minds-solar-system/id578659268)

Explore the Solar System with an interactive science book designed for young learners. Features engaging 3D simulations, striking visuals, and fascinating facts to make learning about space fun and educational for kids at home or in the classroom.

**Highlights:** Interactive 3D simulations, Visual size comparisons of celestial bodies, Demonstrates planetary orbits and speeds, Explains planetary tilt, rotation, day/night cycles, and seasons, Shows Solar System scale and distances, Compares gravity on different celestial bodies, Covers Milky Way, Sun, planets, moons, dwarf planets, and more

**Features:** macOS Compatibility

**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 Interactive Minds Solar System free?

Interactive Minds Solar System costs $2.99, with no in-app purchases.

### Is Universe Size Comparison free?

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

### Which has better reviews, Interactive Minds Solar System or Universe Size Comparison?

Interactive Minds Solar System is rated higher. Interactive Minds Solar System averages 5.0 out of 5 from 6 ratings, while Universe Size Comparison averages 3.1 from 29 ratings.

### Do Interactive Minds Solar System or Universe Size Comparison have ads?

Neither Interactive Minds Solar System nor Universe Size Comparison shows ads.

### Which is updated more often, Interactive Minds Solar System or Universe Size Comparison?

Interactive Minds Solar System ships an update every 2 months, and Universe Size Comparison every 4 months. Most recently, Interactive Minds Solar System was updated on October 21, 2026 and Universe Size Comparison on October 9, 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.*