# Calliope Sim vs Violin Tuner

The clearest difference is price: Calliope Sim at Free against Violin Tuner's $19.99. Violin Tuner's advantage is update cadence (every 3 weeks vs every 3 months). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Calliope Sim is free to download; Violin Tuner costs $19.99 up front. Calliope Sim sells 1 one-off in-app purchase and Violin Tuner sells 2 in-app purchases, starting at $2.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Calliope Sim ships an update every 3 months, Violin Tuner every 3 weeks. The most recent releases landed on October 24, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Calliope Sim | Violin Tuner |
| --- | --- | --- |
| Price | **Free** | $19.99 |
| Rating | **[5.0 (4 ratings)](https://appshunter.io/ios/app/calliope-sim/id6740209595/reviews)** | — |
| Number of ratings | **4** | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 3 months | **Every 3 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 114 MB | 56 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Alper Kahriman](https://appshunter.io/developer/1054578352) | [NETIGEN Kluzowicz sp. j.](https://appshunter.io/developer/892331873) |

## What reviewers say

### Calliope Sim

[App page](https://appshunter.io/ios/app/calliope-sim/id6740209595)

Experience the nostalgic charm of traditional fairgrounds and circuses with this realistic calliope simulator. It offers authentic sounds and advanced features like microtonal tuning and reverb for expressive musical performances. Record and share your creations easily.

**Highlights:** Authentic calliope sound sample, Microtonal tuning, Transpose adjustment, Reverb effects, Chorus mode, Dynamic key sensitivity, Built-in recorder, Shareable performances

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Get Premium | $7.99 | one-time |


### Violin Tuner

[App page](https://appshunter.io/ios/app/violin-tuner-xtuner-pro/id6744936213)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 week subscription + trial | $2.99 | per 7 days |
| Forever one-time payment | $19.99 | one-time |


## Frequently asked questions

### Is Calliope Sim free?

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

### Is Violin Tuner free?

Violin Tuner costs $19.99, and also offers in-app purchases.

### Do Calliope Sim or Violin Tuner have ads?

Both Calliope Sim and Violin Tuner show ads.

### Which is updated more often, Calliope Sim or Violin Tuner?

Calliope Sim ships an update every 3 months, and Violin Tuner every 3 weeks. Most recently, Calliope Sim was updated on October 24, 2026 and Violin Tuner on October 9, 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.*