# Tuning Fork Study vs Solar System&Celestial Objects

The clearest difference is price: Solar System&Celestial Objects at Free against Tuning Fork Study's $1.99. Solar System&Celestial Objects also leads on update cadence (every 6 weeks vs every 37 months). Tuning Fork Study's advantage is ads (none vs shown). On in-app purchases, device support and iOS requirement there is nothing between them.

Solar System&Celestial Objects is free to download; Tuning Fork Study costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Tuning Fork Study ships an update every 37 months, Solar System&Celestial Objects every 6 weeks. The most recent releases landed on September 24, 2026 and September 14, 2026 respectively.

## The numbers

| Metric | Tuning Fork Study | Solar System&Celestial Objects |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 37 months | **Every 6 weeks** |
| Size | 224 MB | 62 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [VIRTUAL FILAMENTS PRIVATE LIMITED](https://appshunter.io/developer/1474217212) | [NIKI TECH](https://appshunter.io/developer/1788609104) |

## What reviewers say

### Tuning Fork Study

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

**Features:** macOS Compatibility

**In-app purchases:** none


### Solar System&Celestial Objects

[App page](https://appshunter.io/ios/app/solar-system-and-celestial-objects/id6503188651)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Tuning Fork Study free?

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

### Is Solar System&Celestial Objects free?

Solar System&Celestial Objects is free to download, with no in-app purchases.

### Do Tuning Fork Study or Solar System&Celestial Objects have ads?

Solar System&Celestial Objects shows ads; Tuning Fork Study does not.

### Which is updated more often, Tuning Fork Study or Solar System&Celestial Objects?

Tuning Fork Study ships an update every 37 months, and Solar System&Celestial Objects every 6 weeks. Most recently, Tuning Fork Study was updated on September 24, 2026 and Solar System&Celestial Objects on September 14, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*