# MIDIWriter vs BlueKeyDetect

The clearest difference is rating: BlueKeyDetect at 5.0 against MIDIWriter's 1.5. BlueKeyDetect also leads on update cadence (every 8 months vs every 35 months) and iOS requirement (10.0 vs 16.0). On price, ratings volume, ads and in-app purchases there is nothing between them.

MIDIWriter costs $0.99 and BlueKeyDetect $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

BlueKeyDetect holds the better App Store score, 5.0 against 1.5. Both are backed by a comparable volume of ratings — 2 and 1 respectively.

MIDIWriter ships an update every 35 months, BlueKeyDetect every 8 months. The most recent releases landed on October 18, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | MIDIWriter | BlueKeyDetect |
| --- | --- | --- |
| Price | $0.99 | $0.99 |
| Rating | [1.5 (2 ratings)](https://appshunter.io/ios/app/midiwriter/id520751563/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/bluekeydetect/id1493584771/reviews)** |
| Number of ratings | **2** | 1 |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 35 months | **Every 8 months** |
| Monetization | Paid | Paid |
| Size | 31 MB | 15 MB |
| Requires iOS | 16.0 | **10.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Masayuki Akamatsu](https://appshunter.io/developer/284722836) | [Stefan Arnhold](https://appshunter.io/developer/432185706) |

## What reviewers say

### MIDIWriter

[App page](https://appshunter.io/ios/app/midiwriter/id520751563)

This app transforms keyboard input into musical notes and sounds. Type characters to instantly generate MIDI messages, or input phrases to create musical sequences with adjustable tempo and looping. It includes a built-in sound engine and supports external MIDI devices and apps.

**Highlights:** Text to MIDI conversion, Built-in General MIDI sound engine, Phrase playback with tempo control, Drum mode with multiple kits, External MIDI output, Hardware keyboard support, Wi-Fi MIDI networking

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

**In-app purchases:** none


### 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


## Frequently asked questions

### Is MIDIWriter free?

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

### Is BlueKeyDetect free?

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

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

BlueKeyDetect is rated higher. MIDIWriter averages 1.5 out of 5 from 2 ratings, while BlueKeyDetect averages 5.0 from 1 ratings.

### Do MIDIWriter or BlueKeyDetect have ads?

Neither MIDIWriter nor BlueKeyDetect shows ads.

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

MIDIWriter ships an update every 35 months, and BlueKeyDetect every 8 months. Most recently, MIDIWriter was updated on October 18, 2026 and BlueKeyDetect on October 13, 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.*