It’s free, lightweight, simple, and clean – but make no mistake. Monolit can get big with sound, with FM, massive unison up to 7 voices, filter drive, and plenty of modulation.

BLEASS has been a fast favorite on iOS with minimalistic, easy-to-read, touch-friendly UIs. Those translate decently enough onto desktop, too, especially if your eyes need a break from skeuomorphism. BLEASS Monolit is a good bread-and-butter, everyday monosynth. And it isn’t just a Minimoog clone or something like that; you get a versatile, modern, digital instrument for free.

The devs also wish everybody a happy Music Day / FĂȘte de la Musique. So grab the iOS version or a laptop with a decent battery and go busk or jam with this! See some friends!

To help you do just that, there’s even a dice tool to randomize parameters, tuned to give you only musical results. (For true randomization, get your cat to just walk across the iPad.)


  • Two oscillators with continuously variable waveforms (pulse / tri / saw + noise on OSC 1)
  • FM (osc 1, 2, or both) with its own oscillator source (also sine/tri/saw/square)
  • Vibrato, glide, all adjustable, with retrig option
  • Unison with up to 7 simultaneous voices and detune control
  • Modulation with routing and mod / slide / pressure controls (like I said, useful for jamming)
  • Built-in arp (same)
  • Multimode filter with slope and drive controls
  • LFO with selectable shape and modulation target, free or sync

Not too shabby – what you need for a lot of jobs, no more, no less.

Available now for direct download (macOS/Windows) and on the App Store (iOS).

AAS, VST3, AU, 64-bit, yes, of course, Apple Silicon M1/M2 native support.