# midi Sampler vs Viola Tuner Professional

The clearest difference is price: midi Sampler at $1.99 against Viola Tuner Professional's $19.99. midi Sampler also leads on in-app purchases (none vs 2). Viola Tuner Professional's advantage is rating (3.9 vs 2.6) and update cadence (every 4 months vs every 30 months). On ratings volume, ads, monetization model and device support there is nothing between them.

midi Sampler costs $1.99 and Viola Tuner Professional $19.99 up front. Viola Tuner Professional sells 2 one-off in-app purchases. midi Sampler asks for nothing beyond the download.

Viola Tuner Professional holds the better App Store score, 3.9 against 2.6. Both are backed by a comparable volume of ratings — 5 and 9 respectively. Written reviews point the same way: 0% of midi Sampler's written reviews are positive against 22% of Viola Tuner Professional's.

midi Sampler ships an update every 30 months, Viola Tuner Professional every 4 months. The most recent releases landed on September 22, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | midi Sampler | Viola Tuner Professional |
| --- | --- | --- |
| Price | **$1.99** | $19.99 |
| Rating | [2.6 (5 ratings)](https://appshunter.io/ios/app/midi-sampler/id641950873/reviews) | **[3.9 (9 ratings)](https://appshunter.io/ios/app/viola-tuner-professional/id806811415/reviews)** |
| Number of ratings | 5 | **9** |
| Positive reviews | 0.0% of reviews | **22.2% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 30 months | **Every 4 months** |
| Monetization | Paid | Paid |
| Size | 7 MB | 7 MB |
| Requires iOS | **14.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | +4 | 4+ |
| Developer | [Gianluca Natalini](https://appshunter.io/developer/348380792) | [Pedro Daniel Macalupu Cumpen](https://appshunter.io/developer/492172409) |

## What reviewers say

### midi Sampler

[App page](https://appshunter.io/ios/app/midi-sampler/id641950873)

Transform your device into a powerful musical instrument sampler. Record or import sounds to create custom instruments, play live with virtual keyboards, or connect an external MIDI controller. Explore a vast library of free sound samples.

**Highlights:** Create custom instruments from single sounds, Receive MIDI messages from external keyboards, Import common audio formats (wav, mp3, caf, m4a), Automatic scale generation across 8 octaves, Two independent multi-touch virtual keyboards, Free downloadable sound samples

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

**In-app purchases:** none


### Viola Tuner Professional

[App page](https://appshunter.io/ios/app/viola-tuner-professional/id806811415)

This application provides precise and easy viola tuning with instant loading and high responsiveness. It features an intuitive interface with visual indicators and offers advanced settings and a tuning fork as in-app purchases. Suitable for musicians of all skill levels.

**Highlights:** Precise frequency display in Hz, Multiple calibration options for A string, Instant loading and fast tuning, Intuitive UI with LED indicator, Visual indicators for tuned strings, Advanced settings and tuning fork (in-app purchase)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Settings | Free | one-time |
| Tuning Fork | Free | one-time |


## Frequently asked questions

### Is midi Sampler free?

midi Sampler costs $1.99, with no in-app purchases.

### Is Viola Tuner Professional free?

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

### Which has better reviews, midi Sampler or Viola Tuner Professional?

Viola Tuner Professional is rated higher. midi Sampler averages 2.6 out of 5 from 5 ratings, while Viola Tuner Professional averages 3.9 from 9 ratings.

### Do midi Sampler or Viola Tuner Professional have ads?

Neither midi Sampler nor Viola Tuner Professional shows ads.

### Which is updated more often, midi Sampler or Viola Tuner Professional?

midi Sampler ships an update every 30 months, and Viola Tuner Professional every 4 months. Most recently, midi Sampler was updated on September 22, 2026 and Viola Tuner Professional on October 3, 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.*