Sonance: Sound Level Meter
Decibel meter & spectrum
$3.99 · Designed for iPad. Not verified for macOS.
Measure live decibels, min/avg/max/peak, spectrum, spectrogram, weighting, and listening-time guidance. A beautiful sound lab that keeps audio on-device.
Sonance turns your iPhone into a beautiful, instant sound-level meter — and makes a raw number actually mean something.
Point it at the world and watch a high-fidelity decibel gauge swing in real time, see the room's frequencies dance across a live spectrum, and get a plain-language read on whether what you're hearing is safe for your ears. No setup, no sign-up, no waiting.
No ads. No account. Nothing leaves your phone.
— A METER THAT LOOKS AS GOOD AS IT MEASURES —
• A dramatic, animated decibel dial with a smooth needle and crisp readout
• Live MIN / AVG / MAX / PEAK so you can capture a moment or watch a trend
• Six hand-tuned themes — Aurora, Inferno, Mono, Neon, Ocean, Sunset — pick your vibe
— SEE THE SOUND —
• A real-time frequency spectrum that reacts to every voice, beat, and rumble
• A scrolling spectrogram heat-map — time, frequency, and intensity in one stunning view
• A / C / Z frequency weighting, the way real sound meters work
— KNOW WHEN IT'S TOO LOUD —
• Clear hearing-safety guidance based on the NIOSH limit (85 dBA for 8 hours)
• A live "safe listening time" estimate as levels rise
• A reference ladder of everyday sounds — "≈ city traffic," "≈ rock concert" — so the numbers click
— A REFERENCE LIBRARY IN YOUR POCKET —
• Pure 1/3-octave test tones, a full 20 Hz–20 kHz sweep, and white / pink / brown noise
• Calming ambience beds — rain, traffic, café — to compare and demo
• A 1 kHz reference tone to help you calibrate against a known meter
— PRIVATE BY DESIGN —
Sonance works 100% on your device. The microphone is used only to measure sound in the moment — audio is never recorded, saved, or sent anywhere. No accounts, no tracking, no network. Ever.
Great for noisy restaurants, concerts, the gym, power tools, a baby's room, a too-loud AC, a home studio, or just satisfying curiosity about how loud the world really is.
Note: iPhone microphones aren't laboratory instruments. Sonance shows an estimated SPL and includes a calibration control so you can dial it in. Hearing-safety figures are educational, not medical advice.
Built for fast, private sound checks wherever you are.
New in 1.1: Saved-session field reports summarize total measurement time, estimated equivalent level, highest peak, projected dose, time-left estimate, and CSV export. Reports are numeric only and contain no audio.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Sharper sound-level displays, improved technical label legibility, stronger accessibility, and a repaired automated UI test suite.
The developer, Robert Corbin, 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.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Robert Corbin
- Size
- 55.6 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.
- iPhone
- Languages
- English
- Age Rating
9+
- 9+
- Contains
Health or Wellness Topics
- Copyright
- © 2026 Robert Corbin
