Measure the noise
around you.
NoiseLog turns your iPhone into a fast, accurate decibel meter — log it, chart it, and get warned when it’s too loud. Pay once. No subscription.
One-time $6.99 · Works offline · No account, no tracking
Pay once
No subscription, ever
On-device
Audio never leaves your phone
Offline
No account, no internet needed
Export
Your data, in CSV
A real instrument, not a toy
Depth that measures up: precise metering, meaningful logs, and guidance that helps you protect your hearing.
Instant, accurate readings
A responsive decibel gauge shows the sound around you in real time, with min, average, max and peak for every session. Calibrate once to match a reference and trust what you see.
- Real-time dB gauge
- Min · avg · max · peak
- Adjustable calibration
Know the moment it’s too loud
Set a threshold and NoiseLog warns you the instant sound crosses it — with a haptic buzz and an optional notification. Built-in NIOSH guidance shows how long exposure is safe.
- Custom threshold alerts
- Smart, no-spam warnings
- NIOSH exposure guidance
Log and chart every session
Save a measurement with one tap — or automatically on stop. Revisit it as a professional time-based chart, then export any session to CSV and share it anywhere.
- One-tap & auto-save
- Time-based charts
- CSV export & share
Understand every decibel
A clear reference translates numbers into the real world — from a whisper to a jet engine — so you always know what a reading actually means for your ears.
- Everyday level guide
- Hearing-risk context
- Works fully offline
Your sound stays yours
NoiseLog analyzes the microphone entirely on your device, in real time, only to compute the level on screen. Audio is never recorded, stored, or sent anywhere — there’s no account and no server.
- No recording, ever
- No analytics or trackers
- Works completely offline
One price. Yours forever.
The others charge every month. NoiseLog is a single purchase that unlocks everything — no subscription, no surprises.
NoiseLog Pro
One-timeRivals charge about $4.99 every month.
- Live decibel meter & calibration
- Unlimited saved measurements
- Threshold alerts & notifications
- Time-based history charts
- CSV export & sharing
- Every future update included
Free to download · unlock Pro anytime
Questions, answered
How accurate are the readings?
NoiseLog gives a close estimate of sound level in decibels. Because phone microphones aren’t lab-calibrated, use the in-app calibration to match a reference for the best results. Treat readings as a helpful guide, not a certified measurement.
Is there really no subscription?
Correct. NoiseLog is a single one-time purchase ($6.99) that unlocks everything forever. No monthly fees, no recurring charges.
Does it work offline?
Yes — all measuring, logging, and charting happen entirely on your device. No internet connection is required.
Is my audio private?
Completely. Audio is analyzed live on your device to compute the level and is never recorded, stored, or uploaded.
How do I restore my purchase?
On a new device, open Settings → Restore purchase and sign in with the same Apple ID used for the original purchase.
Measure your world today
Download NoiseLog and see the sound around you — one-time $6.99, no subscription.