Learn how to cancel Spectrum Spectrogram Analyzer subscription on iPhone, Android, Paypal or directly.
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Alternative method via AppStore:
1. Using half-overlapped (adjustable) time window to increase time resolution. * Various window functions provided, for different frequency resolution and dynamical range. * Peak frequency detection (in unit of Hz and note+cent), with a moderate accuracy (FFT + interpolation). * Pinch to zoom, drag or swipe to move, long-press to place cursor, double touch to reset zoom. ** May need some knowledge of discrete Fourier transform and spectrum analysis to use it well. ** The actual accuracy mainly depends on your device.
2. Can be used for monitoring or measuring environmental sound or noise; help tuning instruments; timing short sound events; and educational purpose. * Can label frequency axis using music pitch note. * Support all possible sampling rates and almost all recorder sources of your device. * Graph with nice grid lines and labels, easy to operate. * FFT sample size range from 512 to 8192.
3. No calibration interface provided.