Best K.O. II alternatives: apps like K.O. II

10+ similar apps compared and reviewed

4.4 avg rating

10 free apps

Updated November 2026

海洋符

K.O. II is great, but it's not the only option. Explore 10+ similar apps for iPhone and iPad, each reviewed and rated by real users. Find free alternatives, premium upgrades, and hidden gems.

Top Alternatives to K.O. II

Derson DSynth Mobile by DERSON PRODUCTIONS, LLC

Sound design synth

Editor's Choice

🎵 Music

3.0(1 ratings)

Free

Create complex sounds with a polyphonic synthesizer. Build custom patches using multiple oscillators, envelopes, and a flexible effects chain. Practice or perform with responsive on-screen keys and MIDI input.

Tonic Synths by UpTech Works, LLC

Play + Sculpt + Export Audio

Strong Contender

🎵 Music

5.0(2 ratings)

Free

This app offers a portable music studio with 14 unique synthesizers for creating and sculpting audio. Users can draw sounds, program melodies, and apply effects like reverb and compression. Recordings can be exported as WAV files for use in other projects.

PocketChop by Fabio Antonucci

Pocket sampler & loop maker

Worth Considering

🎵 Music

0.0(0 ratings)

Free

More apps like K.O. II

TinyTone

Simple Synth

Free

Create professional synth patches for music production and live performance. Design sounds in real-time with a powerful synthesizer engine, dual oscillators, and extensive modulation options. Export and import patches, and use it as an AUv3 plugin in DAWs.

Powerful synthesizer engineDual oscillators with FM synthesisReal-time audition with touch pads

Virtual Analog Drum Machine

Free

Create distorted percussion, hypnotic sequences, and aggressive sounds with this raw virtual analog drum machine. It offers six voices, dual LFOs, and fast hands-on control for electronic music production.

Virtual analog drum machineDistorted percussionHypnotic sequences

Insightful Audio Synthesizer

by Insight Designs Web Solutions, LLC

Free

Create unique music presets using AI by describing their sound in natural language. Integrate these AI-generated sounds into your favorite iOS music applications that support AudioUnits.

AI-powered sound preset generationNatural language sound descriptionAudioUnits integration

This app offers a classic algorithmic reverb effect based on the Freeverb algorithm. It adds depth, space, and atmosphere to audio sources, creating lush, spacious ambience. Designed for mono use, it provides a smooth, musical reverb tail suitable for vocals and synthesizers.

Classic Freeverb algorithmSchroeder/Moorer reverb topologyComb and allpass filters

Nugget 02 - Series 9000

Low-pass filter with drive

Free

This audio effect plugin emulates a classic 80s low-pass filter with added features like a 12-bit quantizer and envelope follower. It offers precise control over cutoff, drive, and resonance for unique sound shaping. The app includes a light or dark color scheme and can be used standalone or within a compatible host.

Sixth-order low-pass filter emulation12-bit quantizerEnvelope follower for cutoff modulation

MOUND - Music Generator

Generate songs without AI

Free

Create unique music by layering sounds and applying effects with intuitive touch controls. Explore chord progressions, sonic combinations, and evolving soundscapes.

Collage soundscape sequencerFour mix channels100+ soundfont instruments

🎵 Music

(8)

free with in-app purchases

Compare with K.O. II

M2DX

MIDI 2.0 FM Synthesizer

Free

Create music with a powerful 6-operator FM synthesizer. Explore hand-crafted presets or import classic DX7 banks. Use the on-screen keyboard or connect MIDI controllers for a versatile music-making experience.

6-operator, 32-algorithm FM synthesisOn-screen keyboard with velocity controlDX7-format .syx bank import