Sound HUD - Decibel Meter

Decibel Meter & Sound HUD

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

Sound HUD is a professional real-time acoustic sound level meter (dB SPL) and telemetry dashboard designed with a tactical aviation cockpit head-up display. KEY FEATURES: • Real-time high-precision sound level measurement (dB SPL) with zero lag. • Frequency Weighting Curves: A-Weighting (human ear), C-Weighting (industrial/peak), and Z-Weighting (unweighted flat linear). • Comprehensive metrics: Continuous equivalent level (LAeq), peak level (Peak Hold), minimum, and maximum sound pressure levels. • Noise Dose Safety Monitor based on NIOSH standards (85 dBA / 8-hour exposure limit). • Dynamic historical charts with SwiftUI Charts and selectable time horizons (1m, 5m, 30m). • Real-time 16-band Fast Fourier Transform (FFT) frequency spectrum visualizer. • Precise microphone calibration offset (±10 dB) in 0.5 dB increments. • Acoustic telemetry session report generator with one-tap Markdown and plain text export. • 4 Tactical Cockpit Themes: Tactical Amber, Neon Cyan, Matrix Green, and Arctic White. • Light / Dark appearance modes and high-legibility avionics typography (Garmin & Tesla cockpit fonts). • Complete privacy: 100% on-device volatile audio processing. No audio is ever recorded, stored, or transmitted to any server. SOUND HUD PRO: Unlock unlimited real-time FFT spectrum analysis, unlimited telemetry report exports, and remove all advertisements permanently with a single lifetime purchase.

Ratings & Reviews

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- Full trilingual support (English, Spanish, Portuguese) across all HUD metrics, settings, and reports. - Enhanced real-time acoustic metering and background interruption handling. - 24-hour frequency spectrum unlocks with persistent session tracking. - Improved NIOSH acoustic dosimeter and telemetry export reliability. - General performance and UI stability improvements.

Version 1.1

The developer, Jaime Villalobos, 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 Used to Track You

    The following data may be used to track you across apps and websites owned by other companies:

    • Identifiers

  • Data Not Linked to You

    The following data may be collected but it is not linked to your identity:

    • Identifiers
    • Usage Data
    • Diagnostics

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
Jaime Villalobos
Size
7.3 MB
Category
Utilities
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 SVM Dev Studio
  • Developer Website
  • Privacy Policy

    • More by Jaime Villalobos