# Solar System AR 4D vs Tuning Fork Study

The clearest difference is price: Solar System AR 4D at Free against Tuning Fork Study's $1.99. Tuning Fork Study's advantage is in-app purchases (none vs 3). On update cadence, ads, device support and iOS requirement there is nothing between them.

Solar System AR 4D is free to download; Tuning Fork Study costs $1.99 up front. Solar System AR 4D sells 1 one-off in-app purchase. Tuning Fork Study asks for nothing beyond the download.

Solar System AR 4D ships an update every 46 months, Tuning Fork Study every 37 months. The most recent releases landed on October 7, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Solar System AR 4D | Tuning Fork Study |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 46 months | **Every 37 months** |
| Size | 122 MB | 224 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Ibrahim Amer](https://appshunter.io/developer/1054899889) | [VIRTUAL FILAMENTS PRIVATE LIMITED](https://appshunter.io/developer/1474217212) |

## What reviewers say

### Solar System AR 4D

[App page](https://appshunter.io/ios/app/solar-system-ar-4d/id1593970513)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock | $5.99 | one-time |


### 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 Solar System AR 4D free?

Solar System AR 4D is free to download, with in-app purchases available.

### Is Tuning Fork Study free?

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

### Do Solar System AR 4D or Tuning Fork Study have ads?

Neither Solar System AR 4D nor Tuning Fork Study shows ads.

### Which is updated more often, Solar System AR 4D or Tuning Fork Study?

Solar System AR 4D ships an update every 46 months, and Tuning Fork Study every 37 months. Most recently, Solar System AR 4D was updated on October 7, 2026 and Tuning Fork Study on October 10, 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.*