# Viola Tuner Professional vs metrOnly

The clearest difference is price: metrOnly at Free against Viola Tuner Professional's $9.99. metrOnly also leads on in-app purchases (none vs 2). Viola Tuner Professional's advantage is update cadence (every 4 months vs every 20 months) and iOS requirement (15.6 vs 18.0). On rating, ratings volume, ads and monetization model there is nothing between them.

metrOnly is free to download; Viola Tuner Professional costs $9.99 up front. Viola Tuner Professional sells 2 one-off in-app purchases. metrOnly asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 3.9 for Viola Tuner Professional against 4.0 for metrOnly. Both are backed by a comparable volume of ratings — 9 and 4 respectively.

Viola Tuner Professional ships an update every 4 months, metrOnly every 20 months. The most recent releases landed on November 6, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Viola Tuner Professional | metrOnly |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| Rating | [3.9 (9 ratings)](https://appshunter.io/ios/app/viola-tuner-professional/id806811415/reviews) | **[4.0 (4 ratings)](https://appshunter.io/ios/app/metronly/id6447021874/reviews)** |
| Number of ratings | **9** | 4 |
| Positive reviews | 22.2% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 20 months |
| Monetization | Paid | Paid |
| Size | 7 MB | 2 MB |
| Requires iOS | **15.6** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Pedro Daniel Macalupu Cumpen](https://appshunter.io/developer/492172409) | [Austin Danson](https://appshunter.io/developer/1680074559) |

## What reviewers say

### 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 |


### metrOnly

[App page](https://appshunter.io/ios/app/metronly/id6447021874)

This metronome app provides perfectly timed clicks without distracting features like accents or blinking lights. It offers tempo adjustments from 10-500 bpm and includes accessibility options for ease of use. Designed for focused practice, it aims to be a simple and effective tool for musicians.

**Highlights:** Perfectly timed clicks, No distracting features, Tempo range 10-500 bpm, Intuitive tempo adjustment, Accessibility options, Customization features

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

**In-app purchases:** none


## Frequently asked questions

### Is Viola Tuner Professional free?

Viola Tuner Professional costs $9.99, and also offers in-app purchases.

### Is metrOnly free?

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

### Which has better reviews, Viola Tuner Professional or metrOnly?

metrOnly is rated higher. Viola Tuner Professional averages 3.9 out of 5 from 9 ratings, while metrOnly averages 4.0 from 4 ratings.

### Do Viola Tuner Professional or metrOnly have ads?

Neither Viola Tuner Professional nor metrOnly shows ads.

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

Viola Tuner Professional ships an update every 4 months, and metrOnly every 20 months. Most recently, Viola Tuner Professional was updated on November 6, 2026 and metrOnly on November 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.*