# C Tuner vs Solar System Viewer

The clearest difference is rating: C Tuner at 5.0 against Solar System Viewer's 4.4. C Tuner also leads on in-app purchases (none vs 4) and iOS requirement (12.1 vs 26.0). Solar System Viewer's advantage is update cadence (every 2 months vs every 28 months) and ratings volume (28 vs 1). On price, ads, monetization model and device support there is nothing between them.

C Tuner costs $2.99 and Solar System Viewer $2.99 up front. Solar System Viewer sells 4 one-off in-app purchases. C Tuner asks for nothing beyond the download.

C Tuner holds the better App Store score, 5.0 against 4.4. That said, the two scores are not equally well evidenced: Solar System Viewer has 28 ratings behind it against 1, so its average is the more settled of the two.

C Tuner ships an update every 28 months, Solar System Viewer every 2 months. The most recent releases landed on October 7, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | C Tuner | Solar System Viewer |
| --- | --- | --- |
| Price | $2.99 | $2.99 |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/c-tuner/id1516461982/reviews)** | [4.4 (28 ratings)](https://appshunter.io/ios/app/solar-system-viewer-8planets/id1554639445/reviews) |
| Number of ratings | 1 | **28** |
| Positive reviews | — | 83.3% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 28 months | **Every 2 months** |
| Monetization | Paid | Paid |
| Size | 13 MB | 22 MB |
| Requires iOS | **12.1** | 26.0 |
| Devices | iPhone, iPod, Apple Watch | **iPhone, iPad, Mac, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Jongyun Park](https://appshunter.io/developer/382617671) | [BLUE COMET LABS LLC](https://appshunter.io/developer/1492055170) |

## What reviewers say

### C Tuner

[App page](https://appshunter.io/ios/app/c-tuner/id1516461982)

This application provides musicians with a simple and intuitive tuning tool. It features an analog-style display for precise tuning, a basic metronome, and visual feedback when playing an instrument. It also offers Apple Watch compatibility.

**Highlights:** Intuitive analog interface, Precise tuning display, Basic metronome function, Visual instrument feedback, Apple Watch support

**In-app purchases:** none


### Solar System Viewer

[App page](https://appshunter.io/ios/app/solar-system-viewer-8planets/id1554639445)

Explore and simulate the orbits of planets in our solar system. This app allows you to speed up or slow down time, travel to any date, and view planetary positions. It also offers widgets for your home screen and Apple Watch complications.

**Highlights:** Simulate planetary orbits, Adjust time speed, Time travel to specific dates, Home screen widgets, Apple Watch integration, View planet overviews

**Features:** Apple Watch app, Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Io Tip | $1.99 | one-time |
| Europa Tip | $3.99 | one-time |
| Ganymede Tip | $5.99 | one-time |
| Callisto Tip | $9.99 | one-time |


## Frequently asked questions

### Is C Tuner free?

C Tuner costs $2.99, with no in-app purchases.

### Is Solar System Viewer free?

Solar System Viewer costs $2.99, and also offers in-app purchases.

### Which has better reviews, C Tuner or Solar System Viewer?

C Tuner is rated higher. C Tuner averages 5.0 out of 5 from 1 ratings, while Solar System Viewer averages 4.4 from 28 ratings.

### Do C Tuner or Solar System Viewer have ads?

Neither C Tuner nor Solar System Viewer shows ads.

### Which is updated more often, C Tuner or Solar System Viewer?

C Tuner ships an update every 28 months, and Solar System Viewer every 2 months. Most recently, C Tuner was updated on October 7, 2026 and Solar System Viewer on October 24, 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.*