# Violin Instrument vs Koto Sim

The clearest difference is in-app purchases: Violin Instrument at none against Koto Sim's 1. Violin Instrument also leads on ads (none vs shown) and ratings volume (20 vs 4). Koto Sim's advantage is update cadence (every 4 weeks vs every 20 months) and rating (5.0 vs 4.6). On price and device support there is nothing between them.

Both are free to download. Koto Sim sells 1 one-off in-app purchase. Violin Instrument asks for nothing beyond the download.

Koto Sim holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: Violin Instrument has 20 ratings behind it against 4, so its average is the more settled of the two.

Violin Instrument ships an update every 20 months, Koto Sim every 4 weeks. The most recent releases landed on October 20, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Violin Instrument | Koto Sim |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (20 ratings)](https://appshunter.io/ios/app/violin-instrument/id6505035979/reviews) | **[5.0 (4 ratings)](https://appshunter.io/ios/app/koto-sim/id6740201723/reviews)** |
| Number of ratings | **20** | 4 |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 20 months | **Every 4 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 40 MB | 125 MB |
| Requires iOS | 15.6 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Himalay Diyora](https://appshunter.io/developer/1736716287) | [Alper Kahriman](https://appshunter.io/developer/1054578352) |

## What reviewers say

### Violin Instrument

[App page](https://appshunter.io/ios/app/violin-instrument/id6505035979)

Master the violin with this comprehensive virtual instrument app. It offers authentic sounds, extensive music collections, customizable tutorials, and practice modes for all skill levels. An integrated tuner helps refine your performance.

**Highlights:** Authentic virtual violin sounds, Extensive collection of scales, chords, and melodies, Customizable tutorials and practice modes, Integrated tuner, Sheet music library, Interactive exercises

**Features:** macOS Compatibility

**In-app purchases:** none


### Koto Sim

[App page](https://appshunter.io/ios/app/koto-sim/id6740201723)

Experience the authentic sound and feel of Japan's national string instrument. This app offers realistic koto tones, customizable interfaces, and multiple play modes for musicians and enthusiasts. Record and share your creations within an immersive simulation.

**Highlights:** Authentic koto sounds, Customizable interface and tuning, Three dynamic play modes, Built-in recorder, Screen recording for sharing, Immersive simulation environment

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Get Premium | $8.99 | one-time |


## Frequently asked questions

### Is Violin Instrument free?

Violin Instrument is free to download, with no in-app purchases.

### Is Koto Sim free?

Koto Sim is free to download, with in-app purchases available.

### Which has better reviews, Violin Instrument or Koto Sim?

Koto Sim is rated higher. Violin Instrument averages 4.6 out of 5 from 20 ratings, while Koto Sim averages 5.0 from 4 ratings.

### Do Violin Instrument or Koto Sim have ads?

Koto Sim shows ads; Violin Instrument does not.

### Which is updated more often, Violin Instrument or Koto Sim?

Violin Instrument ships an update every 20 months, and Koto Sim every 4 weeks. Most recently, Violin Instrument was updated on October 20, 2026 and Koto Sim 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.*