Know Exactly
How Loud It Is
Sound Level Check turns your phone's microphone into a real-time dB-A meter. Instantly, privately, no sign-up required, and no audio is ever recorded, only the numbers.
See It In Action
A Precision Instrument, Not a Toy
Open Sound Level Check and the gauge is already live, dB-A reading, min/avg/max, and a scrolling graph, all updating in real time.
Live dB-A Gauge
A smooth, damped needle points to the current reading, with safe/caution/danger zones colored directly on the arc, and min/max markers plotted live.
Clean Calibration
Compare against a reference meter and dial in a simple +/- offset, with a live "after calibration" preview, no confusing formulas.
Numeric-Only Session Recording
Save a full session with min/avg/max and a loudest-moment highlight, without ever recording or storing actual audio.
Threshold Alerts
Set a noise limit and get a vibration alert the moment your environment crosses it, useful for hearing-safety-conscious moments.
Full Feature Set
Everything Built Around One Job: Telling You How Loud It Is
Sound Level Check isn't a spectrum analyzer or a scientific dosimeter. Every control exists to get you a trustworthy dB reading, fast.
Real-Time dB-A Metering
A proper A-weighted SPL reading, refreshed at least 10 times a second for smooth needle motion, with the numeric readout throttled just enough to stay legible.
Color-Coded Safety Zones
The gauge arc itself is tinted green, yellow, and red for safe, caution, and danger ranges, so you understand risk at a glance, not just a raw number.
Reference Chart
A live-highlighted chart from 0 to 140+ dB with real-world examples, whisper, conversation, traffic, concert, so a number becomes something you can picture.
Simple Calibration
A +/- stepper with a live "after calibration" preview lets you match a reference meter, persisted globally until you change it again.
Session History & Loudest Moment
Every recorded session saves locally with min/avg/max, duration, and an auto-detected loudest moment, complete with a scrollable time-series graph.
Threshold Alerts
Set a configurable dB-A limit and get a vibration or notification the moment your environment crosses it, with cooldown logic so it never spams you.
Simple by Design
From Open to Reading in an Instant
No account, no tutorial, no settings to get through first. Open the app and the gauge is already reading.
Open the App
Sound Level Check launches straight into the live gauge, no login screen in the way.
Read the Gauge
The needle and numeric dB-A readout update live, with the reference chip telling you what that level actually sounds like.
Record if Needed
Tap record to start a session, min/avg/max and a graph build automatically, with a loudest moment surfaced at the end.
Save or Export
Stop and the session auto-saves locally. Export it as an image or CSV to share or analyze elsewhere.
Who It's Built For
Anyone Who's Ever Wondered "How Loud Is This, Exactly?"
Sound Level Check isn't a specialist audio-engineering tool. It's a fast, trustworthy utility for anyone who needs a real noise reading.
Workplace Safety & Facilities Checks
Quickly check whether a workspace, workshop, or job site is within a safe noise range, without carrying a dedicated meter.
Homeowners & Renters
Document a noisy neighbor, a loud appliance, or street traffic with an actual number and a saved session, not just a complaint.
Parents Checking Nursery Noise
Confirm a room, toy, or white-noise machine stays in a safe range for a baby's hearing, with threshold alerts to flag anything too loud.
Anyone Curious About Everyday Noise
From a concert to a busy street, sometimes you just want to know the number behind what your ears are telling you.
What the Numbers Actually Mean
A Chart That Turns dB Into Something Real
Every reading auto-highlights its band on the built-in reference chart, so a number like "72 dB" instantly becomes "about as loud as a restaurant."
What Users Say
A Reading You Can Actually Trust
From workplace checks to nursery noise, Sound Level Check has become a quick, reliable habit for the people using it.
"Every other meter app I tried had a calibration formula I couldn't make sense of. This one just has a plus and minus button and a live preview. Took ten seconds."
"I wanted to check the noise level in my baby's room without another app that records actual audio. This one only logs numbers, exactly what I was looking for."
"The loudest-moment card in session history is genuinely useful. I don't need to scrub through a whole graph, it just tells me the peak and when it happened."
Common Questions
Frequently Asked
Stop Guessing How Loud It Is
Sound Level Check installs in a couple of taps. From then on, your phone doubles as a precise, private decibel meter, wherever you need one.
Get Sound Level CheckFree to start • No account required • No audio ever recorded