This app was removed from the App Store.
Electrical Filters Pro
iOS Universal Education
Electrical Filter Calculator - Butterworth, Chebyshev, InverseChebyshev, Cauer-Elliptical, Bessel-Thomson, Legendre.
1) Low-Pass, High-Pass, Band-Pass, Band-Stop Filters.
2) Magnitude, Phase, Delay, Step, and Impulse Responses.
3) Filter polynomial, zeroes, and poles.
4) Op-Amp circuit Implementations
5) Ladder Circuit coefficients. (Butterworth)
Update to iOS 9.2