Call it the people’s iOS synth: Synth One is free – without ads or registration or anything like that – and loved. And now it’s reached 1.0, with iPad and iPhone support and some expert-designed sounds.

First off – if you’ve been wondering what happened to Ashley Elsdon, aka Palm Sounds and editor of our Apps section, he’s been on a sabbatical since September. We’ll be thinking soon about how best to feature his work on this site and how to integrate app coverage in the current landscape. But you can read his take on why AudioKit matters, and if Ashley says something is awesome, that counts.

But with lots of software synths out there, why does Synth One matter in 2019? Easy:

It’s really free. Okay, sure, it’s easy for Apple to “give away” software when they make more on their dongles and adapters than most app developers charge. But here’s an independent app that’s totally free, without needing you to join a mailing list or look at ads or log into some cloud service.

It’s a full-featured, balanced synth. Under the hood, Synth One is a polysynth with hybrid virtual analog / FM, with five oscillators, step sequencer, poly arpeggiator, loads of filtering and modulation, a rich reverb, multi-tap delay, and loads of etras.

There’s standards support up the wazoo. Are you visually impaired? There’s Voice Over accessibility. Want Ableton Link support? MIDI learn on everything? Compatibility with Audiobus 3 and Inter App Audio so you can run this in your favorite iOS DAW? You’re set.

It’s got some hot presets. Sound designer Francis Preve has been on fire lately, making presets for everyone from KORG to the popular Serum plug-in. And version 1.0 launches with Fran’s sound designs – just what you need to get going right away. (Fran’s sound designs are also usually great for learning how a synth works.)

It’s the flagship of an essential framework. Okay the above matters to users – this matters to developers (who make stuff users care about, naturally). Synth One is the synthesizer from the people who make AudioKit. That’s good for making sure the framework is solid, plus —

You can check out the source code. Everything is up at github.com/AudioKit/AudioKitSynthOne – meaning Synth One is also an (incredibly sophisticated) example app for Audio Kit.

More is coming… MPE (MIDI Polyphonic Expression) and AUv3 are coming soon, say the developers.

And now the big addition —

It runs on iPhone, too. I have to say, I’ve been waiting for a synth that’s pocket sized for extreme portability, but few really are compelling. Now you can run this on any iPhone 6 or better – and if you’ve got a higher-end iPhone (iPhone X/XS/XR / iPhone XS Max / 6/7/8 Plus size), you’ll get a specially optimized UI with even more space.

Check out this nice UI:

On iPhone:

More: