Neon Engine

Slowed + Reverb Audio Engine

Only for iPhone

Free · Designed for iPhone. Not verified for macOS.

iPhone

Experience your music in high-fidelity neon. Studio-grade slowed and reverb effects, on-device privacy, and a reactive visualizer for the ultimate late-night aesthetic Transform your audio into a late-night atmosphere. Neon Engine is a precision audio utility designed specifically for the slowed and reverb community. Whether you’re into City Pop, Synthwave, or Lo-fi, Neon Engine gives you the tools to reshape your local music library into a deep, immersive experience. No cloud processing, no data tracking—just pure, on-device audio engineering. -- KEY FEATURES -- Precision Slowed Engine: Professional-grade time-stretching that keeps your audio crystal clear, even at ultra-low speeds. Atmospheric Reverb: A high-fidelity reverb algorithm tuned for "Cathedral" and "Studio" space simulations. Reactive Neon Visualizer: Watch your music breathe. The UI pulses and tints in real-time based on your track’s frequency data. Local-First Privacy: We don't want your data. All audio processing is handled entirely on your device’s hardware. Files Integration: Easily import your own tracks directly from the iOS Files app. -- WHY NEON ENGINE? -- Most "slowed" tools distort the sound or upload your files to a server. Neon Engine uses the power of your iPhone’s silicon to provide smooth, artifact-free processing locally. It’s a dedicated space for those who appreciate the aesthetic side of music. Note: Neon Engine is designed for local audio files you own. We respect the artist and the craft—all processing is for personal, creative use.

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The developer, JUNGYUN JO, 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

    The developer does not collect any data from this app.

    Privacy practices may vary based, for example, on the features you use or your age. Learn More

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    Provider
    • JUNGYUN JO
    Size
    • 3.3 MB
    Category
    • Music
    Compatibility
    Requires iOS 17.6 or later.
    • iPhone
      Requires iOS 17.6 or later.
    • Mac
      Requires macOS 14.6 or later and a Mac with Apple M1 chip or later.
    • Apple Vision
      Requires visionOS 1.3 or later.
    Languages
    • English
    Age Rating
    4+
    Copyright
    • © 2026 Jo Jung-yun. All rights reserved.