Sound Level Check

Sound Level Check turns your phone into a precise, A-weighted decibel meter — instantly, privately, with no sign-up required.

Point it at any environment — your home, office, a concert, traffic — and see exactly how loud it is in real time, measured against the same dB-A weighting used by professional sound level meters.

REAL-TIME METERING
• Live analog gauge with a smooth, damped needle — no jumpy readings
• Large, always-readable dB-A number, updated continuously
• Rolling 30-second graph so you can see trends, not just a snapshot
• Live MIN / AVG / MAX tracking, running even before you hit record

KNOW WHAT THE NUMBER MEANS
Tap the reference chip to open a full reference chart, from a whisper (30 dB) to a jet takeoff (130 dB), with your current reading highlighted live as it changes.

CALIBRATE IN SECONDS
Compare against a reference sound level meter and dial in a simple +/- offset, with a live "after calibration" preview. No confusing formulas.

SESSION HISTORY, NUMBERS ONLY
Start a recording and Sound Level Check logs your MIN, AVG, and MAX dB-A, plus your session's loudest moment — automatically saved to your history, with full session detail and export as an image or CSV.

NOISE LIMIT ALERTS
Set a dB-A threshold — 85 dB is a common hearing-safety guideline — and feel a vibration alert the moment your environment crosses it.

PEAK HOLD
Freeze the loudest moment on screen while the meter keeps running underneath, handy for spot-checking a reading without missing it.

PRIVATE BY DESIGN
Sound Level Check never records, stores, or transmits audio. Only numeric dB-A readings are logged, and they stay on your device. No accounts, no cloud sync, no sign-up, ever.

Free to use, supported by a small, restrained banner ad. A one-time purchase removes ads for good — no subscriptions, ever.

Note: phone microphones are tuned for voice and can be limited at very high sound levels, so treat readings as a helpful guide rather than a lab-certified measurement.

Recent changes:
Initial release of Sound Level Check — a real-time, A-weighted decibel meter.
• Live gauge, graph, and MIN/AVG/MAX tracking
• Reference chart with real-world loudness examples
• One-tap calibration
• Session history with loudest-moment detection
• Noise limit alerts
• Peak hold
Private by design: no audio is ever recorded, no sign-up required.