Professional-grade sound level meter & analysis app with full auto-calibration of mobile devices :

• Human Auditory Perception Loudness (Phon, Sone) Analysis
• Professional Calibration Wizard with Full Auto-Calibration
• Real-time Sound Level Measurement (dB SPL, dBA, dBC, Leq)
• Advanced Acoustic Filter (A/C) Weighting and Leq Analysis
• 1/3 Octave Band Sound Spectrum Analysis
• Fast/Slow Time Weighting Selection
• Max/Min Detection with Hold Function
• Multiple Display Modes: Sound Level Meter, 2D Sound Spectrum, 3D Sound Waterfall
• Perception Noise Visualization
• Screenshot Capture and Storage
• Intuitive Interface with Real-time Visualization
• Customized Sound Measurement Parameters
• Offline Sound Measurement Capability
• Local Sound Data Processing for Privacy
• Privacy-First Design
• Multi-language Support (English, Korean)

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