Loudly: Decibel Meter dB

Turn your iPhone into a professional-grade sound level meter. Loudly measures noise levels in real time with stunning accuracy, displayed on a beautiful Liquid Glass gauge.

Whether you're checking if your baby's room is quiet enough, documenting noise for a complaint, or protecting your hearing at a concert — Loudly gives you instant, reliable decibel readings.

ACCURATE & PROFESSIONAL
• IEC 61672 compliant audio engine
• A-weighting and C-weighting frequency filters
• Fast, Slow, and Impulse time weighting modes
• Calibration controls for reference-level accuracy

BEAUTIFUL & INTUITIVE
• Large, easy-to-read circular gauge
• Color-coded noise levels: green (safe) → red (dangerous)
• Noise categories with real-world examples: Whisper, Quiet, Moderate, Loud, Very Loud, Dangerous

PRO FEATURES (one-time $2.99 unlock)
• Min / Max / Average statistics
• Session history — track measurements over time
• Peak alerts — get notified when noise exceeds your threshold
• Leq (equivalent continuous sound level) calculation
• Export your readings

PRIVACY FIRST
• No data collection. No ads. No tracking.
• 100% on-device processing — audio is never recorded or stored
• No network requests. Your microphone data stays on your device.

COMMON USES
• Check noise levels at work, home, or events
• Monitor baby room sound levels
• Document noise for complaints or disputes
• Measure environmental noise pollution
• Protect your hearing — know when it's too loud

No subscription. No ads. Pay once for Pro, yours forever.