# Universe Size Comparison vs Tuning Fork Study

The clearest difference is update cadence: Universe Size Comparison at every 3 months against Tuning Fork Study's every 37 months. Tuning Fork Study's advantage is iOS requirement (12.0 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.

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

Universe Size Comparison ships an update every 3 months, Tuning Fork Study every 37 months. The most recent releases landed on November 3, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | Universe Size Comparison | Tuning Fork Study |
| --- | --- | --- |
| 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 3 months** | Every 37 months |
| Monetization | Paid | — |
| Size | 411 MB | 224 MB |
| Requires iOS | 17.0 | **12.0** |
| Devices | iPhone, iPad, Apple TV | iPhone, iPad, iPod |
| Age rating | +4 | 4+ |
| Developer | [Daniele Citi](https://appshunter.io/developer/1187632258) | [VIRTUAL FILAMENTS PRIVATE LIMITED](https://appshunter.io/developer/1474217212) |

## What reviewers say

### 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


### Tuning Fork Study

[App page](https://appshunter.io/ios/app/tuning-fork-study-edutech-era/id6444695848)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Universe Size Comparison free?

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

### Is Tuning Fork Study free?

Tuning Fork Study costs $1.99, with no in-app purchases.

### Do Universe Size Comparison or Tuning Fork Study have ads?

Neither Universe Size Comparison nor Tuning Fork Study shows ads.

### Which is updated more often, Universe Size Comparison or Tuning Fork Study?

Universe Size Comparison ships an update every 3 months, and Tuning Fork Study every 37 months. Most recently, Universe Size Comparison was updated on November 3, 2026 and Tuning Fork Study on October 27, 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.*