GR Synth

Industrial FM Synth & WAV

Only for iPhone

$1.99 · Designed for iPhone. Not verified for macOS.

iPhone

Shape industrial FM tones, explore 21 offline built-in presets, create repeating foreground sequences, and export complete 48 kHz WAV files. GR Synth is a native industrial FM synthesizer for iPhone. Shape unstable machine tones with deep frequency modulation, pitch sweeps, noise, distortion, bit crushing, resonant filtering, delay, and atmospheric reverb. Explore 21 curated, read-only built-in presets—including Kolyat calling customer service—or create personal presets that stay on your iPhone. Trigger machine phrases and individual notes, connect to a DAW through USB audio and Core MIDI, and render 48 kHz stereo WAV files for Files, AirDrop, and production workflows. Ringtone Mode repeats the current sound while GR Synth is in the foreground. Edit the synth while it runs and each new repeat uses the latest controls. Choose 1–20 repeats and 1–30 seconds between triggers, then export the complete timed sequence as one WAV file. Ringtone Mode does not install or replace an iPhone system ringtone. FEATURES • Native low-latency stereo synthesis • Deep FM, pitch sweeps, noise, distortion, filtering, delay, and reverb • 21 bundled, read-only built-in presets • Private on-device preset saving • Foreground-only repeating signal mode with live editing • Full repeating-sequence WAV export • Core MIDI input and virtual destination • USB audio workflow for recording into a Mac DAW • Offline 16-bit, 48 kHz stereo WAV export • Sticky Play Machine Phrase control while editing sounds No account or network connection is required.

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The developer, Ryan Wall, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Not Collected

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    Information

    Seller
    • Ryan Wall
    Size
    • 2.7 MB
    Category
    • Music
    Compatibility
    Requires iOS 17.0 or later.
    • iPhone
      Requires iOS 17.0 or later.
    • Mac
      Requires macOS 14.0 or later and a Mac with Apple M1 chip or later.
    • Apple Vision
      Requires visionOS 1.0 or later.
    Languages
    • English
    Age Rating
    4+
    Copyright
    • © 2026 Ryan Wall
  • Developer Website
  • Privacy Policy

    • Supports

    • Family Sharing

      Up to six family members can use this app with Family Sharing enabled.