o46scope vs FNam FFT Spectrogram Analyzer

o46scope is an audio measurement app for iPhone and iPad that helps you visualize sound in real time. It supports oscilloscope and FFT spectrum display, allowing you to inspect waveforms and frequency components instantly. The app also supports internal signal generation with Tone1 / Tone2 and test signal (Beep) output, making it useful for quick checks, learning, and simple audio measurement tasks. Key features • Oscilloscope display • FFT spectrum display • Signal tab for signal control • Internal signal generation with Tone1 / Tone2 • Speaker output for tones • Test signal (Beep) output • Adjustable parameters Premium Tone1 / Tone2 internal signal generation is available as a premium feature. It is available without ads. Ideal for users who want waveform visualization, frequency analysis, and signal generation in one app. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

■ FNam FFT Spectrogram Analyzer Engineers need tools that are ready to use — anytime, anywhere. FNam FFT Spectrogram Analyzer turns your smartphone into a professional audio analysis tool. Unlike typical sound meter apps, it delivers advanced features like Dual File Comparison and CSV Export for precise post-analysis * completely free, no ads. Real-time FFT & Spectrogram / All processing runs on-device / No audio data uploaded externally. [Video Guide - See it in action] https://youtu.be/72SYLTG0l_8 ■ NEW FEATURES 1. Octave Band View Mode - Analyze sound levels by octave bands. - Choose 1/1 or 1/3 octave band resolution in Settings. 2. Sound Event Logger - Automatically logs sound events when the level exceeds a set threshold. - Can save event WAV files and FNam JSON logs for later review. - Includes a screensaver mode to reduce screen burn-in. ■ KEY FEATURES 1. Real-time Audio Analysis • High-precision FFT (Fast Fourier Transform) Graph. • Time Domain Waveform (Oscilloscope) view. • Fluid Spectrogram for visualizing frequency changes over time. 2. Dual File Comparison (Exclusive Feature) • Simultaneous loading of two WAV files for comparative analysis. • Spectrum Overlay: Visually compare differences using color-coded traces (Blue vs. Magenta). • Instant Calculation: Provides Arithmetic Mean and Mean Difference between signals. 3. Data Logging & Export • Flexible Sampling Rates: Supports various rates (4000Hz, 8000Hz, 16000Hz, 22050Hz, 44100Hz). • High-quality Recording: Audio is recorded and saved as WAV files, strictly matching the selected sampling rate. • Raw Data Export: Exports raw PCM data to CSV format. The exported data maintains the exact sampling rate and duration, making it optimized for post-processing in Excel, MATLAB, or Python. • File Management: Files are stored in the 'On My iPhone\FFT Analyzer' directory. - WAV naming format: Date_Time_SampleRate_Channel.wav ex) 20260219_164715_44100Hz_Mono.wav - CSV naming format: Selected WAV file name_SampleRate_Duration(s).csv ex) 20260219_164715_44100Hz_Mono_44100_5.2s.csv 4. Professional Configuration • Window Functions: Selectable Rectangular, Hann, Hamming, and Blackman windows. • Frequency Weighting: Supports A, B, C, and Z (Linear) standard weighting filters. • Axis Control: Supports both Auto-scaling and Manual range settings (Hz / dB) for precise graph inspection. • Calibration: Independent offset controls for FFT and Time Domain to ensure alignment with professional reference equipment. • Max Peak Hold: Displays and holds the maximum amplitude values across the frequency spectrum. • Octave Band View Mode: Visualizes frequency levels as octave band bars for easier band-by-band analysis. ■ TECHNICAL SPECIFICATIONS • Signal Processing: Anti-aliasing filters are automatically applied during downsampling to ensure measurement accuracy. • Sampling Rate: Supports standard rates up to 44.1kHz (device dependent). • Standards: Implements IEC 61672 frequency-weighting formulas for A/B/C weighting calculations. Note: This app implements IEC 61672 frequency-weighting formulas. Measurement discrepancies compared to professional equipment may occur due to the hardware frequency response limitations of the built-in smartphone microphone. For critical measurements, the use of a calibrated external microphone is recommended.