# BloopKeys — Music Theory MIDI Keyboard

> Music theory MIDI keyboard for finding notes, keys, and chords. (iPhone/iPad app by Joel Stephen Birchler.)

- Source: https://appshunter.io/ios/app/bloopkeys/id6689494178 (this page in markdown: same URL + `.md`)
- Developer: [Joel Stephen Birchler](https://appshunter.io/developer/1768680914)
- Category: Music, Music
- Price: $1.99
- Rating: 4.75/5 from 4 App Store ratings · 2 written reviews indexed
- Age rating: 4+
- Requires: iOS 17.4 · 4 MB
- Languages: English
- Released: 2024-10-30
- Data updated: 2026-06-01
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/bloopkeys/id6689494178/reviews.md

## What is BloopKeys?

A simple tool for musicians that helps you find all of the right notes in the right key. Use the built-in synth sounds or send MIDI output to hardware synths or your DAW.

Helps you answer:
* What notes are in this key?
* What keys have these notes?
* What chords are in this key?

Features:
* Three built-in synth presets (mallets, horns, and a fuzzy synth)
* MIDI out over USB or network
* Supports 30+ scales including diatonic, pentatonic, blues, bebop, and more!
* Filter notes to a selected key/scale
* Find keys with selected notes
* Chord pads for easy chord playing
* Roman numeral analysis

## Key features

- Note and key finder
- Built-in synth presets
- MIDI out support
- 30+ scale support
- Chord pads
- Roman numeral analysis

## Recent user reviews (2 of 2)

All indexed reviews: https://appshunter.io/ios/app/bloopkeys/id6689494178/reviews.md

### 4/5 — Nearly a perfect music inspiration app.

*2025-08-08*

So this app is nearly perfect as a creation tool.  It’s quick, lightweight, inexpensive, fun, and helps loads to demystify a huge amount of theory gatekeeping.  Sadly it does not support auv3 so you can’t use it as a midi controller for the near infinite iOS synths and samplers out there.  This is my biggest request.  It does support wired midi out which is nice, but if I’m using my iOS device I’m doing it for the sake of convenience and want to save my usb port for more important things like an interface or charging. 

My second request is if they created an omnichord like arpeggio strip to one side of the interface as melodies and bass lines could be created with the chord device.  It wouldn’t clutter the interface and would make the entire experience dramatically more usable.

Even without these additions, this is usually the first app I draw inspiration from if I’m looking for a randomized chord progression machine.

### 5/5 — Super helpful app for my music

*2024-10-31*

This app lets me a younger bedroom music producer to see what notes are in the key im playing in without having to look them up or try to memorize them. Super helpful app

## Frequently asked questions about BloopKeys

### What is BloopKeys?

BloopKeys is a music theory MIDI keyboard application designed to help musicians identify notes, keys, and chords. It offers built-in synth sounds and MIDI output for integration with other music software and hardware.

### What scales does BloopKeys support?

BloopKeys supports over 30 different scales, including diatonic, pentatonic, blues, and bebop scales. This allows for a wide range of musical exploration and composition.

### Can I use BloopKeys with my DAW or hardware synths?

Yes, BloopKeys offers MIDI out functionality over USB or network. This enables you to send MIDI signals to your digital audio workstation (DAW) or hardware synthesizers.

### What are the built-in synth sounds in BloopKeys?

BloopKeys includes three built-in synth presets: mallets, horns, and a fuzzy synth. These provide immediate sound options for practicing and composing directly within the app.

### How much does BloopKeys cost?

BloopKeys is a paid application priced at $1.99. This one-time purchase grants you access to all of its features.

### What devices is BloopKeys available on?

BloopKeys is compatible with both iPhone and iPad devices, allowing musicians to use it on their preferred Apple mobile platform.

### How often is BloopKeys updated?

The application was last updated on January 4, 2025, indicating recent development and potential for ongoing improvements and bug fixes.

### Does BloopKeys have ads?

No, BloopKeys does not contain advertisements. As a paid application, it offers an uninterrupted user experience without any in-app ads.

## Version history (last 2 releases)

### 1.0.4 — 2025-01-04

* Fixed: Spelling in finder keyboard was sometimes incorrect when tonic was not natural in main view
* Added iPad support!

### 1.0 — 2024-10-30

No release notes.

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-01.*