# AltoClef vs Viola Tuner

The clearest difference is review sentiment: AltoClef at 100% against Viola Tuner's 25%. AltoClef also leads on rating (5.0 vs 2.7) and in-app purchases (none vs 2). On price, ratings volume, device support and iOS requirement there is nothing between them.

Both are free to download. Viola Tuner sells 2 in-app purchases, starting at $2.99 per 7 days. AltoClef asks for nothing beyond the download.

AltoClef holds the better App Store score, 5.0 against 2.7. Both are backed by a comparable volume of ratings — 5 and 11 respectively. Written reviews point the same way: 100% of AltoClef's written reviews are positive against 25% of Viola Tuner's.

AltoClef ships an update daily, Viola Tuner every 3 weeks. The most recent releases landed on September 24, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | AltoClef | Viola Tuner |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (5 ratings)](https://appshunter.io/ios/app/altoclef/id1627977451/reviews)** | [2.7 (11 ratings)](https://appshunter.io/ios/app/viola-tuner-xtuner-pro/id6744968300/reviews) |
| Number of ratings | 5 | **11** |
| Positive reviews | **100.0% of reviews** | 25.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Daily** | Every 3 weeks |
| Monetization | **Free** | Free with in-app purchases |
| Size | 1 MB | 54 MB |
| Requires iOS | 13.0 | **12.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Khaleel Jamal Annajjar](https://appshunter.io/developer/1419755574) | [NETIGEN Kluzowicz sp. j.](https://appshunter.io/developer/892331873) |

## What reviewers say

### AltoClef

[App page](https://appshunter.io/ios/app/altoclef/id1627977451)

A game designed to help viola players improve their sight-reading speed. It offers a focused learning experience for musicians looking to master alto clef notation.

**Highlights:** Sight-reading practice, Alto clef focus, Viola player learning, Basic gameplay, Future updates planned

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

**In-app purchases:** none


### Viola Tuner

[App page](https://appshunter.io/ios/app/viola-tuner-xtuner-pro/id6744968300)

This application offers a precise and user-friendly way to tune your viola. It features professional sound recordings and advanced algorithms for accurate pitch recognition, with multiple tuning modes available. The app works offline and provides advanced settings for musicians.

**Highlights:** Professional viola sound recordings, Offline tuning capabilities, Auto tune, manual, and chromatic modes, Adjustable concert pitch (Hz), Deviation display in cents, Custom tuning and presets

**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 AltoClef free?

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

### Is Viola Tuner free?

Viola Tuner is free to download, with in-app purchases available.

### Which has better reviews, AltoClef or Viola Tuner?

AltoClef is rated higher. AltoClef averages 5.0 out of 5 from 5 ratings, while Viola Tuner averages 2.7 from 11 ratings.

### Do AltoClef or Viola Tuner have ads?

Viola Tuner shows ads; AltoClef does not.

### Which is updated more often, AltoClef or Viola Tuner?

AltoClef ships an update daily, and Viola Tuner every 3 weeks. Most recently, AltoClef was updated on September 24, 2026 and Viola Tuner on October 21, 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.*