Decibel & Sound Meter - Sendb
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About this app
Sound Meter by Sendb is an Android sound level meter that measures loudness, frequency spectrum, and spectrogram directly on your device - no cloud, no account.
Completely free, no ads, no subscription, no in-app purchases. No annoying interruptions - just open it and measure.
FEATURES
• Live level metering with dB(A), dB(C), and dB(Z) weighting, a color-coded level bar, and everyday sound references (e.g. "30 dB: Whisper")
• Real-time frequency spectrum across 30 third-octave bands from 25 Hz to 20 kHz
• Scrolling spectrogram with frequency and time axes
• 60-second level trend graph
• Single-point calibration against a known reference source for more reliable absolute readings
• Session statistics: Leq, Min, Max, L10, L50, L90
• Microphone selection (e.g. when a device has multiple built-in microphones)
• Light and dark theme
• 14 languages, including Arabic with right-to-left layout
PRIVACY
The actual sound level measurement - weighting filters, FFT, level calculation - runs entirely on your device. No measurement data is ever stored or transmitted. Only your calibration value and app settings are kept locally; both stay on your device and are removed automatically when you uninstall the app.
Full privacy policy: meter.sendb.day
ABOUT
Sound Meter by Sendb is an independent, non-commercial project - no ad network, no subscription model, no hidden costs. The measurement algorithms (A/C/Z weighting per recognized standards, FFT-based spectral analysis) were implemented independently based on publicly documented methods.
Note: This app provides relative, or - after calibration against a known reference source - approximate absolute sound level readings. It is not a substitute for a calibrated precision sound level meter and is not suitable for safety-critical or legally binding measurements (e.g. occupational safety, noise compliance).
Completely free, no ads, no subscription, no in-app purchases. No annoying interruptions - just open it and measure.
FEATURES
• Live level metering with dB(A), dB(C), and dB(Z) weighting, a color-coded level bar, and everyday sound references (e.g. "30 dB: Whisper")
• Real-time frequency spectrum across 30 third-octave bands from 25 Hz to 20 kHz
• Scrolling spectrogram with frequency and time axes
• 60-second level trend graph
• Single-point calibration against a known reference source for more reliable absolute readings
• Session statistics: Leq, Min, Max, L10, L50, L90
• Microphone selection (e.g. when a device has multiple built-in microphones)
• Light and dark theme
• 14 languages, including Arabic with right-to-left layout
PRIVACY
The actual sound level measurement - weighting filters, FFT, level calculation - runs entirely on your device. No measurement data is ever stored or transmitted. Only your calibration value and app settings are kept locally; both stay on your device and are removed automatically when you uninstall the app.
Full privacy policy: meter.sendb.day
ABOUT
Sound Meter by Sendb is an independent, non-commercial project - no ad network, no subscription model, no hidden costs. The measurement algorithms (A/C/Z weighting per recognized standards, FFT-based spectral analysis) were implemented independently based on publicly documented methods.
Note: This app provides relative, or - after calibration against a known reference source - approximate absolute sound level readings. It is not a substitute for a calibrated precision sound level meter and is not suitable for safety-critical or legally binding measurements (e.g. occupational safety, noise compliance).
Free Db Sound level & decibel meter with spectrum. No ads, no subscription
Updated on
Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
- No data shared with third partiesLearn more about how developers declare sharing
- No data collectedLearn more about how developers declare collection
What’s new
Added a help button explaining measurement accuracy without calibration — tap the "?" next to the uncalibrated badge on the Meter screen.
