Quiet Noise Meter

Quiet Noise Meter turns your phone's microphone into a real-time decibel (dB) sound meter — and lets you log exactly when and how loud it got, so you have a record to reference later.

Whether it's noisy upstairs neighbors, a study room or office, a baby's sleep environment, or checking instrument practice volume, this app goes beyond a single reading: it helps you build a history of measurements you can refer to in conversations with neighbors or building management (note: readings are uncalibrated, reference-only values, not an official certified measurement).

■ Key features
- Real-time dB measurement showing current / minimum (MIN) / average (AVG) / maximum (MAX) at once
- Half-circle analog gauge plus a rolling 30-second waveform graph for an at-a-glance trend
- Color-coded dB ranges with everyday reference labels (e.g. "30dB whisper, 60dB conversation, 80dB subway")
- One-tap save after each measurement, with a place tag (living room / bedroom / office / outdoors / custom) and a short note
- History list grouped by date, swipe to delete, detail view with text sharing
- Streak badge for consecutive days logged, to build a consistent measuring habit
- Keeps the screen awake while measuring
- Full Korean and English support

■ Good to know
- Readings from a phone microphone are uncalibrated, reference-only values and are not valid for official/legal documentation.
- Microphone audio is used only on-device to calculate the dB reading — it is never saved and no recording file is ever created.
- All saved records stay on your device only (no sign-up or login required) and are never sent to a server.

Take the first step toward a quieter home or room — start measuring with Quiet Noise Meter today.