Digital Filter Designer

Digital Filter Designer is the tool for designing IIR digital filters on your Android device. You can design Butterworth, Chebyshev, 2nd Order Shelf, 2nd Order Parametric, DC Blocker, First-Order Lag, Exponential Averaging filters and IEC 61672-1/ANSI S1. 43 A-Weighting & C-Weighting filters with this app.