# Schubert String Quartets vs OnKey

The clearest difference is review sentiment: Schubert String Quartets at 100% against OnKey's 0%. Schubert String Quartets also leads on rating (5.0 vs 3.0). OnKey's advantage is update cadence (every 2 months vs every 38 months) and price ($4.99 vs $6.99). On ratings volume, ads, in-app purchases and monetization model there is nothing between them.

Schubert String Quartets costs $6.99 and OnKey $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Schubert String Quartets holds the better App Store score, 5.0 against 3.0. Both are backed by a comparable volume of ratings — 1 and 2 respectively. Written reviews point the same way: 100% of Schubert String Quartets's written reviews are positive against 0% of OnKey's.

Schubert String Quartets ships an update every 38 months, OnKey every 2 months. The most recent releases landed on October 24, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Schubert String Quartets | OnKey |
| --- | --- | --- |
| Price | $6.99 | **$4.99** |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/schubert-string-quartets/id888974275/reviews)** | [3.0 (2 ratings)](https://appshunter.io/ios/app/onkey-scale-practice/id1638204692/reviews) |
| Number of ratings | 1 | **2** |
| Positive reviews | **100.0% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 38 months | **Every 2 months** |
| Monetization | Paid | Paid |
| Size | 639 MB | 2 MB |
| Requires iOS | 18.0 | **14.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Zininworks Inc.](https://appshunter.io/developer/431572491) | [Rea Meir](https://appshunter.io/developer/1638204694) |

## What reviewers say

### Schubert String Quartets

[App page](https://appshunter.io/ios/app/schubert-string-quartets/id888974275)

Experience classical music with synchronized sheet music that scrolls automatically. Enjoy high-quality recordings of complete string quartets, with features like background playback and adjustable speed.

**Highlights:** Synchronized auto-scrolling sheet music, Background playback, AirPrint support, Adjustable playback speed, Complete string quartets, High-quality recordings

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

**In-app purchases:** none


### OnKey

[App page](https://appshunter.io/ios/app/onkey-scale-practice/id1638204692)

This app generates readable, note-based exercises for practicing scales and chords. It's ideal for musicians of all levels looking for a focused and efficient way to improve their technique and theory knowledge without manual preparation.

**Highlights:** Generate note-based exercises, Select scale or chord type, Transpose to any key, Set range and clef, Choose from various patterns, Add note names and time signatures

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

**In-app purchases:** none


## Frequently asked questions

### Is Schubert String Quartets free?

Schubert String Quartets costs $6.99, with no in-app purchases.

### Is OnKey free?

OnKey costs $4.99, with no in-app purchases.

### Which has better reviews, Schubert String Quartets or OnKey?

Schubert String Quartets is rated higher. Schubert String Quartets averages 5.0 out of 5 from 1 ratings, while OnKey averages 3.0 from 2 ratings.

### Do Schubert String Quartets or OnKey have ads?

Neither Schubert String Quartets nor OnKey shows ads.

### Which is updated more often, Schubert String Quartets or OnKey?

Schubert String Quartets ships an update every 38 months, and OnKey every 2 months. Most recently, Schubert String Quartets was updated on October 24, 2026 and OnKey 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.*