Best Hex MIDI alternatives: apps like Hex MIDI: Isomorphic Keyboard

Whether you want more options like Hex MIDI or a completely different take on the same concept, our curated list of 10+ similar apps has you covered. Updated for 2026 with the latest ratings and comparisons.

Top Alternatives to Hex MIDI

24-TET Keys: Microtonal MIDI by Maxim Oransky

Quarter Tones on a Keyboard

Editor's Choice

4.6(5 ratings)

Free

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Explore microtonal music with a virtual keyboard that plays notes between standard semitones. Hear quarter tones instantly, send them as MIDI to your DAW, and discover unique keyboard layouts that morph into each other.

Rubberband: Microtonal Synth by Thinkspark

Maqam, quarter-tone, MPE glide

Strong Contender

0.0(0 ratings)

FreeIn-App Purchases

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Rubberband: Microtonal Synth screenshot 3

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Harmonaut by District One Mobile, LLC

MIDI Chord Composition

Worth Considering

Grid-based MIDI step sequencer

5.0(6 ratings)

Free

Create music by feel without needing music theory. This app generates rich chords and smooth progressions, allowing you to shape the mood with intuitive controls. Save and reorder your musical ideas effortlessly.

More apps like Hex MIDI

GridStep

$3.99

A professional MIDI step sequencer offering a focused grid-based workflow for clear, controlled, and predictable music creation. It functions as a standalone app and an AUv3 plugin, ideal for both live performance and composition.

Grid-based MIDI step sequencingExplicit edit modes for notes, velocity, slides, and mutesTrigger-based step advance

(3)

paid

Master the Strings of Harpejji

Harpejii Instrument

Interactive Harpejji string playbackOne-tap music recordingHigh-quality audio output

This app allows you to play, record, and share music using a virtual Harpejji instrument. Explore interactive modes, learn traditional scales, and connect with a community of musicians.

(2)

free

Fingerophone: Touch Synth

Analog Pocket Synthesizer

(0)

Remove Noise & Boost Voice

Ai Audio Enhancer

AI Voice EnhancementBackground Noise ReductionAudio Quality Improvement

Improve audio recordings instantly with AI. This app cleans up background noise and enhances voices for clearer, more professional sound. Ideal for podcasts, content creation, and professional use.

free with in-app purchases

(1)

Earz Solo

Music education at home

Note reading lessonsMusic theory instructionEar training for chords and scales

Learn music theory, note reading, and ear training with interactive lessons and gamified exercises. Explore chords, scales, harmony, and instruments at your own pace. Offers a free demo before purchase.

(0)

subscription

Hoverophone: Theremin Synth

Hand-Played Drone Pad

Air-based theremin playing with front camera hand trackingPolyphonic synthesizer with multiple voice optionsMicrotonal keyboard with 12-TET or 24-TET quarter tones

This app reimagines the theremin for your iPhone, allowing you to play music by waving your hands in the air without touching the screen. It offers a polyphonic synthesizer with various sound options and microtonal capabilities for unique musical exploration.

(3)

free

Kalimba: Instrumental Songs

Relax & meditation melodies

Extensive melody libraryPersonalized Kalimba customizationImmersive ambient sounds

Explore the world of Kalimba with this intuitive app. Create unique sounds with customizable settings and a vast melody library. Record and share your musical creations, enhanced by immersive ambient soundscapes for a relaxing experience.

free with in-app purchases

(1)