# BlueKeyDetect vs RosinTune

The clearest difference is price: RosinTune at Free against BlueKeyDetect's $0.99. RosinTune also leads on update cadence (every 4 days vs every 8 months). BlueKeyDetect's advantage is in-app purchases (none vs 11) and iOS requirement (10.0 vs 16.0). On rating, ratings volume, ads and device support there is nothing between them.

RosinTune is free to download; BlueKeyDetect costs $0.99 up front. RosinTune sells 10 one-off in-app purchases. BlueKeyDetect asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for BlueKeyDetect against 5.0 for RosinTune. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

BlueKeyDetect ships an update every 8 months, RosinTune every 4 days. The most recent releases landed on October 13, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | BlueKeyDetect | RosinTune |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/bluekeydetect/id1493584771/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/rosintune/id6759510259/reviews) |
| Number of ratings | 1 | 1 |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 4 days** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 15 MB | 4 MB |
| Requires iOS | **10.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Stefan Arnhold](https://appshunter.io/developer/432185706) | [Prima Studio](https://appshunter.io/developer/1791887494) |

## 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


### RosinTune

[App page](https://appshunter.io/ios/app/rosintune/id6759510259)

This app provides real-time visual feedback on your violin playing intonation. It listens to your notes and displays whether they are sharp, flat, or perfectly in tune, helping you correct mistakes instantly and track your progress over time.

**Highlights:** Real-time pitch detection for violin, Visual intonation display, Cent-accurate drift indication, Practice session history, Accuracy trends and statistics, Clean, focused interface

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Etude No. 30 | $0.99 | one-time |
| Etude No. 35 | $0.99 | one-time |
| Etude No. 32 | $0.99 | one-time |
| Etude No. 34 | $0.99 | one-time |
| Etude No. 12 | $0.99 | one-time |
| Etude No. 36 | $0.99 | one-time |
| Etude No. 1 | $0.99 | one-time |
| Etude No. 11 | $0.99 | one-time |
| Etude No. 2 | $0.99 | one-time |
| Partita No. 1 in B Minor-II-Double | $1.99 | one-time |


## Frequently asked questions

### Is BlueKeyDetect free?

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

### Is RosinTune free?

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

### Which has better reviews, BlueKeyDetect or RosinTune?

BlueKeyDetect and RosinTune are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.

### Do BlueKeyDetect or RosinTune have ads?

Neither BlueKeyDetect nor RosinTune shows ads.

### Which is updated more often, BlueKeyDetect or RosinTune?

BlueKeyDetect ships an update every 8 months, and RosinTune every 4 days. Most recently, BlueKeyDetect was updated on October 13, 2026 and RosinTune on October 7, 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.*