Crossover Calculator is an Android utility app designed to assist audio engineers and enthusiasts in calculating passive crossover values for various slopes, including 6 dB, 12 dB, and 18 dB per octave. The app provides tools for designing high-pass, low-pass, two-way, band-pass, narrow bandwidth band-pass, and Zobel crossovers. Key features include Linkwitz-Riley and Bessel calculations for 12 dB and 24 dB slopes, along with Chebyshev calculations for 12 dB slopes, making it a versatile tool for audio design.

In addition, the app offers load calculations for up to five speakers, allowing users to determine the total impedance load. It also features a frequency calculator for 6 dB and 12 dB slopes, aiding in frequency cutoff calculations using standard capacitor and inductance values. While the app displays full-screen ads, users can purchase a subscription to remove ads and unlock additional features, enhancing the overall usability of the application.