Chroma: Noise & Sleep Sounds

Noise generated, never looped

Free · In‑App Purchases · Designed for iPad. Not verified for macOS.

Most noise apps play a short recording on repeat. Over a night, you hear the loop. Chroma generates its eight noise colors in real time, sample by sample, for as long as you leave it running. There is no recording and no loop point, so nothing ever comes round again. GENERATED, NOT RECORDED White, pink, brown, green, gray, amber, blue, purple and velvet. Each one is built from its own definition rather than sampled, so it is exact — and because it is generated, it costs no download and never repeats. RECORDED SOUND, LEVEL MATCHED Rain, a stream, wind, cicadas, a distant crowd, two ambient beds, and six birds — nightingale, robin, blackbird, chickadee, thrasher and wood pewee. MIX UP TO THREE Layer up to three sounds with an individual level for each. Rain under a drone. Wind behind crickets. Save a mix and return to it in one tap. STOP WHEN YOU WANT TO Set a wake-time. BUILT FOR iOS • A Control Center button — start and stop without opening the app • Siri and Shortcuts, with the sound itself as a parameter • Long-press the icon for your four most recent sounds • Lock screen controls and artwork • AirPlay and Bluetooth output, with the picker built in • Three app icons PRIVATE No account. No sign-in. No analytics. Chroma has nothing to send anywhere, and collects nothing. FREE AND PAID All nine generated noise colors are free, one at a time, with the minute-based sleep timer. One purchase unlocks the recordings, three-sound mixing, saved mixes, the wake-time fades and the alternate icons. It is a single payment, not a subscription, and it covers every device on your Apple Account. CREDITS The recordings come from Wikimedia Commons under Creative Commons and public domain licenses. Every one is credited in the app with its author, its license and a link to its source page.

Ratings & Reviews

  • 5.0
    out of 5
    1 Ratings

-Fixes Sleep Timer issue

Version 1.3

The developer, Mindful Journals, LLC, 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, for example, based on the features you use or your age. Learn More

    Accessibility

    The developer has not yet indicated which accessibility features this app supports. Learn More

    Information

    Seller
    Mindful Journals, LLC
    Size
    79.1 MB
    Category
    Health & Fitness
    Compatibility
    Requires iOS 17.0 or later.
    • iPhone
      Requires iOS 17.0 or later.
    • iPad
      Requires iPadOS 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+
    In-App Purchases
    Yes
    Copyright
    © 2026 Mindful Journals, LLC
  • Privacy Policy

    • Supports

    • Family Sharing

      Some in-app purchases and subscriptions may be shareable with your family group when Family Sharing is enabled. Learn More

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