PocketNoise: Sound Level Meter

PocketNoise turns your iPhone into a professional-grade sound level meter — no special hardware required. Whether you're a construction worker monitoring daily noise exposure, a parent ensuring a quiet sleep environment, a musician checking stage levels, or a tenant documenting a noise complaint, PocketNoise delivers accurate, calibrated decibel readings with complete logging and reporting. KEY FEATURES • Real-Time dB Meter Instant sound pressure level readings with selectable A, C, or Z frequency weighting. Fast (F) and Slow (S) time-weighting modes match professional SPL meter standards. • Continuous Noise Logging Record dB levels over time with precise timestamps. Review up to 7 days of noise history with detailed visual charts. • Exposure Alerts Automatic notification when your average noise exposure exceeds safe thresholds (85 dB per OSHA / WHO guidelines). Protect your hearing before damage occurs. • PDF Report Export Generate professional time-series reports with one tap — complete with charts and dB statistics. Use them for workplace safety records, landlord disputes, or personal health tracking. • Location Tagging Attach GPS coordinates to recorded noise events for precise, location-aware documentation. • Sleep Guard Mode Set a noise threshold and quiet hours. PocketNoise will alert you the moment sound exceeds your limit — ideal for noisy neighbors or monitoring a baby's room. • Frequency Spectrum Analyzer View a real-time FFT display to identify which frequencies are dominant in your environment. • Full Noise History Browse, filter, and review past recordings. Swipe to delete entries you no longer need. PRIVACY FIRST No account. No login. No cloud. All data is stored locally on your device and never transmitted. We don't collect, sell, or share any of your information. CALIBRATION NOTE PocketNoise uses your iPhone's built-in microphone. Readings reflect relative sound levels and are suitable for everyday monitoring and documentation. For regulatory compliance in professional settings, a certified sound level meter is recommended.