SPLnFFT Noise Meter

SPLnFFT Noise Meter is a professional sound level meter for iOS with advanced features such as real-time FFT, frequency analysis, a test signal generator, and dosimetry. It supports ANSI S1.42 weighting and ITU-R 468-4 and provides accurate measurements (Leq, peak, L10, L95) along with histogram and calibration options.

Designed for both daily use and professional work, the app offers a simple interface for quick exposure checks and powerful tools for detailed analysis. It supports exporting FFT plots as images, generating reference tones, and sharing results via email or social media; microphone access is required and help is available in-app.