Best Synthesizer Free Apps

4.9😊(27K ratings)

Free

AudioKit Synth One Synthesizer screenshot 1

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This is a free, open-source professional synthesizer app for iOS devices. It offers over 300 presets, MIDI support, a sequencer, and vintage-inspired filters. Learn music production basics and create your own sounds.

What We Love

😎 Easy to use
🔥 Clean patches
👍 Awesome synth
🎸 Works great with GarageBand
🤩 Absolutely stunning
💥 Incredible dynamic articulation
🎹 Powerful and intuitive
🎶 Vast set of features
🔊 Amazing quality
🤘 Spanking awesome
🤘 Love the concept
🎹 Immediate access to controls
🎨 Versatile sound creation
🎚️ Smooth and responsive
⭐ Packed with presets
🎧 Excellent sound quality
🎛️ Great interface and patches
🎛️ Powerful soft synth
🎛️ Stunning sounds
🎛️ Awesome all-around

Room to Improve

🤔 No AU support yet
🤔 Crashes with Audiobus 3
🤔 Poor palette of sounds
🤔 Mod wheel issues
🤔 Occasional crashes
🤔 High battery consumption
🤔 Keyboard issues on iPhone

PocketTone - Retro Synth by Chih Han Lin

A pocket synth in your hand

Strong Contender

0.0(0 ratings)

FreeIn-App Purchases

Spectrum Synthesizer Bundle by Thomas Burns

4 Pro Instruments, 30+ Modes!

Worth Considering

Create & play synthesizers

4.8😊(135 ratings)

Free

Spectrum Synthesizer Bundle screenshot 1

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This app provides a bundle of four professional audio unit synthesizers and one effect, inspired by popular eurorack modules. Explore diverse sound design possibilities with multi-mode oscillators, modal synthesis, string generation, and granular sampling. Compatible with DAWs and AU hosts for creative music production.

What We Love

✨ Incredible sound quality
🎶 Deep modulation capabilities
💡 Distinct and unique character
🌊 Excels at fluid soundbeds
🎹 Great for MIDI keyboard use
🚀 Super lightweight
💎 Sonic gem
🎧 Based on Mutable Instruments
💰 Awesome free synths
🌟 Heavenly sounds
🎁 Unbelievably kind creator
🔊 Valuable audio units
⚡️ Sounds like hardware, RAW
🎛️ Expressive sound design
🎁 Surprising download
🌟 Outstanding results
🎵 Special and unique sounds
🎶 Very useful tools
✨ Inspiring for music creation
📱 Portable and pocket-friendly
💸 Best bargain for AUv3
💯 Incredible creative tools
🌟 Beautifully done modules
💡 Phenomenal sound sculpting
🎵 Brilliant digital modules
🌟 Heroic developer effort
🎁 Generous free offering
🤩 Pinch me moment

Room to Improve

🐛 Crashes more than it should
⚠️ Description misleading (granular synth missing)
🐛 Modal synthesizer doesn't work alone
💥 Creates massive feedback on macOS
❌ UI stripped down
🔌 Only works as Audio Units (requires DAW)
📱 Old UI was better on portable devices
❓ Knob names not shown in documentation
📉 Formatting issues on older devices (iPhone 6)
⚠️ Granular synth only shows in Audiobus3, not launchable

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