# BlueKeyDetect vs Violin Sight

The clearest difference is price: Violin Sight at Free against BlueKeyDetect's $0.99. Violin Sight also leads on update cadence (every 9 days vs every 8 months). BlueKeyDetect's advantage is in-app purchases (none vs 1) and iOS requirement (10.0 vs 16.6). On ads and device support there is nothing between them.

Violin Sight is free to download; BlueKeyDetect costs $0.99 up front. Violin Sight sells 1 one-off in-app purchase. BlueKeyDetect asks for nothing beyond the download.

BlueKeyDetect ships an update every 8 months, Violin Sight every 9 days. The most recent releases landed on October 13, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | BlueKeyDetect | Violin Sight |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/bluekeydetect/id1493584771/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 9 days** |
| Monetization | Paid | — |
| Size | 15 MB | 4 MB |
| Requires iOS | **10.0** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Stefan Arnhold](https://appshunter.io/developer/432185706) | [Brandon Wu](https://appshunter.io/developer/6804257965) |

## What reviewers say

### BlueKeyDetect

[App page](https://appshunter.io/ios/app/bluekeydetect/id1493584771)

Instantly identify the musical key and tempo of songs by recording short audio clips. Ideal for musicians in jam sessions needing quick key information.

**Highlights:** Record audio clips, Detect musical key, Display beats per minute (BPM), Supports guitar and bass jam sessions, Multiple recording options for accuracy

**In-app purchases:** none


### Violin Sight

[App page](https://appshunter.io/ios/app/violin-sight-read-studio/id6804257963)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Violin Sight-Read Studio | $6.99 | one-time |


## Frequently asked questions

### Is BlueKeyDetect free?

BlueKeyDetect costs $0.99, with no in-app purchases.

### Is Violin Sight free?

Violin Sight is free to download, with in-app purchases available.

### Do BlueKeyDetect or Violin Sight have ads?

Neither BlueKeyDetect nor Violin Sight shows ads.

### Which is updated more often, BlueKeyDetect or Violin Sight?

BlueKeyDetect ships an update every 8 months, and Violin Sight every 9 days. Most recently, BlueKeyDetect was updated on October 13, 2026 and Violin Sight on October 16, 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.*