Best Harmonic 639 alternatives: apps like Harmonic 639

10+ similar apps compared and reviewed

4.8 avg rating
7 free apps
Updated October 2026

Looking for something like Harmonic 639? We've analyzed 10+ similar apps to help you find the best alternative. Each app is compared by ratings, features, and real user reviews, so you can make the right choice.

Top Alternatives to Harmonic 639

Saucillator#1

Saucillator by Green Noise LLC

Create & play synthesizers
Editor's Choice
🎡 Music
4.9(37 ratings)
Free
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Create and play custom synthesizers and instruments on your mobile device. Manipulate oscillators and effects with touch, record live loops, and design unique sounds with a variety of timbres and customizable effects. Supports AUv3 for use in other music production apps.

Aparillo#2

Aparillo by Sugar Bytes GmbH

The Cinematic Machine
Strong Contender
🎡 Music
4.9😊(507 ratings)
FreeIn-App Purchases
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This advanced FM synthesizer creates complex soundscapes, atmospheres, and a wide range of timbres for film, TV, and games. It features two interacting FM synths, integrated effects, and an intuitive 'Orbiter' for one-touch sound morphing. Seamlessly integrate with your mobile studio setup via MIDI and Audio Unit v3 support.

What We Love

  • πŸš€ Powerful sound design capabilities
  • πŸ‘ Intuitive and creative interface
  • 🎨 Cinematic and otherworldly sounds
  • πŸ’‘ Innovative orbit and spatial features
  • πŸ”₯ Excellent presets and sound quality
  • πŸ€– Versatile and deep FM synthesis

Room to Improve

  • πŸ› Occasional crashes and stability issues
  • πŸ” Lack of clear documentation and tutorials
  • πŸ“± UI not optimized for larger iPad screens
  • πŸ’° Paid upgrade required for full functionality
Super J8 Synth + AUv3#3

Super J8 Synth + AUv3 by AudioKit Pro

Analog Vintage Synthesizer
Worth Considering
🎡 Music
4.9(87 ratings)
$8.99
#45in Music
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This app offers a powerful analog synthesizer emulation, inspired by a legendary vintage instrument. It provides a vast array of sounds, from lush pads to deep basses, with advanced DSP and numerous modulation options. Explore over 700 presets and use it standalone or as an AUv3 plugin.

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Sleep Sounds & ADHD Brainwaves
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Enhance sleep quality and focus with scientifically designed brainwave soundscapes. Explore a library of premium audio tracks and healing frequencies to quiet your mind, reduce anxiety, and promote relaxation.

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iReal Pro
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iReal Pro
Music Book & Backing Tracks
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This app provides a virtual band accompaniment for musicians to practice with, offering realistic sounding instruments and a variety of styles. It also functions as a digital chord chart book, allowing users to create, edit, and share their own song charts.

Virtual band accompanimentCreate, edit, and share chord chartsThousands of downloadable songs
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LANDR - For Music Makers
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