Noise Level dB vs Frequency Analyzer

Noise Level dB is a precise and user-friendly sound meter app that measures noise levels in real-time using your device's microphone, displaying accurate decibel readings with instant updates. Visual color indicators clearly show whether the noise is safe, elevated, or dangerous, helping you assess environments like workplaces, concerts, or neighborhoods at a glance. The app automatically captures peak noise values to track the loudest moments during any session. Switch between analog gauge-style displays and digital numeric readouts for the view that suits you best. Graphs visualize noise trends over time, making it easy to understand patterns and changes. Basic calibration lets you fine-tune microphone sensitivity for more reliable results on your specific device. Your latest measurement is always saved for quick reference. Export data in PDF or CSV formats to create professional reports or share findings. The free version saves only your most recent result and offers basic calibration within ±5 dB accuracy. Upgrade to Premium for unlimited measurement history, detailed day/week/month analytics with advanced graphs, full PDF export capabilities, and extended calibration for maximum precision. Noise Level dB is essential for monitoring sound safety, documenting noise complaints, or simply staying aware of your acoustic surroundings. The app offers auto-renewing subscriptions Weekly $4.99, Monthly $12.99, Yearly $39.99 and a one-time Lifetime purchase for $59.99. Terms of Use Link: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy Link: https://docs.google.com/document/d/1ZvMlg1bNHu52y-VG-hEj7Rebm5oQuG2ahfqljBoB9VU/edit?usp=sharing

See exactly what you're hearing. Frequency Analyzer: SpectraLab turns your iPhone into a precision audio analysis toolkit. Measure live frequency content, generate test tones, and visualize sound in real time. ANALYZE Point your phone at any sound source and see the dominant frequency instantly, in Hz, with a clean live readout. Perfect for tuning instruments, diagnosing hums and buzzes, checking speaker response, or just satisfying your curiosity about the sound around you. SPECTROGRAM Watch sound unfold over time with a vivid, color-coded spectrogram. Spot patterns, harmonics, and anomalies that a single number can't show you. GENERATOR Produce precise test tones and sweeps on demand. Sine, square, and more, with fine control over frequency and amplitude. Useful for speaker testing, hearing checks, room acoustics, and calibration. LIBRARY Save your measurements and exports, organize them with custom labels, search and filter by type, and quickly preview or share anything you've captured. FREE TO START The core analyzer, generator, and library are free to use. No account required. GO PRO Upgrade for larger FFT sizes, every window and weighting function, full-length spectrogram history, unlimited saved presets and export history, noise threshold alerts, and CSV/PDF report export. Try Pro free for 7 days. Whether you're a musician tuning by ear, an audio hobbyist, or just someone who wants to know "what frequency is that?". SpectraLab gives you a clear, accurate answer in seconds. Subscription pricing: - Monthly and Yearly plans available, each with a 7-day free trial - Payment charged to your Apple ID account at confirmation of purchase - Subscription automatically renews unless auto-renew is turned off at least 24 hours before the end of the current period - Manage or cancel your subscription anytime in your Apple ID account settings - Privacy Policy and Terms of Use available in the app and on our website