# Universal Zoom vs Universe Size Comparison

The clearest difference is rating: Universal Zoom at 4.8 against Universe Size Comparison's 3.2. Universal Zoom also leads on review sentiment (97% vs 70%) and ratings volume (366 vs 30). Universe Size Comparison's advantage is price ($1.99 vs $5.99). On update cadence, ads, in-app purchases and monetization model there is nothing between them.

Universal Zoom costs $5.99 and Universe Size Comparison $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Universal Zoom holds the better App Store score, 4.8 against 3.2. That said, the two scores are not equally well evidenced: Universal Zoom has 366 ratings behind it against 30, so its average is the more settled of the two. Written reviews point the same way: 97% of Universal Zoom's written reviews are positive against 70% of Universe Size Comparison's.

Universal Zoom ships an update every 4 months, Universe Size Comparison every 3 months. The most recent releases landed on November 6, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Universal Zoom | Universe Size Comparison |
| --- | --- | --- |
| Price | $5.99 | **$1.99** |
| Rating | **[4.8 (366 ratings)](https://appshunter.io/ios/app/universal-zoom-science-guide/id807673066/reviews)** | [3.2 (30 ratings)](https://appshunter.io/ios/app/universe-size-comparison/id1473946290/reviews) |
| Number of ratings | **366** | 30 |
| Positive reviews | **96.7% of reviews** | 70.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 3 months** |
| Monetization | Paid | Paid |
| Size | 175 MB | 411 MB |
| Requires iOS | **15.5** | 17.0 |
| Devices | **iPhone, iPad, iPod, Apple TV** | iPhone, iPad, Apple TV |
| Age rating | 4+ | +4 |
| Developer | [GamifyIt](https://appshunter.io/developer/807673069) | [Daniele Citi](https://appshunter.io/developer/1187632258) |

## What reviewers say

### Universal Zoom

[App page](https://appshunter.io/ios/app/universal-zoom-science-guide/id807673066)

Explore the universe's vastness and intricacy through interactive visual comparisons. Seamlessly zoom from subatomic particles to the observable universe, gaining intuition about scale and size with stunning imagery and clear explanations.

**Highlights:** Seamless zooming across scales, Visual comparisons of objects, Jargon-free scientific explanations, Audio narration, Over 270 objects presented to scale, Multi-language support

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- 👍 Fascinating and informative
- 🚀 Smooth and seamless experience
- 💡 Puts things into perspective
- 👍 Great learning tool for all ages
- 👍 Visually appealing and well-designed

**What reviewers complain about**

- 🐛 Occasional bugs and crashes
- 🔋 High battery consumption
- 🔇 Background music could be improved

**Reported bugs**

- Incorrect information for some objects
- Compatibility issues on older devices
- Typos and minor errors in text

**Requested features**

- Add more objects and comparisons
- Customizable object feature
- Support for more languages
- Ability to toggle between metric and imperial units
- Search and filtering options


### 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 Universal Zoom free?

Universal Zoom costs $5.99, 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, Universal Zoom or Universe Size Comparison?

Universal Zoom is rated higher. Universal Zoom averages 4.8 out of 5 from 366 ratings, while Universe Size Comparison averages 3.2 from 30 ratings.

### Do Universal Zoom or Universe Size Comparison have ads?

Neither Universal Zoom nor Universe Size Comparison shows ads.

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

Universal Zoom ships an update every 4 months, and Universe Size Comparison every 3 months. Most recently, Universal Zoom was updated on November 6, 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.*