EQBase
7.2#1 in audio equalizer softwareFrom $39.99 a yearFree planAPImacOS
VisitEQBase suits Mac users seeking system-wide audio adjustment, headphone correction profiles, or system audio recording. Pro is for users who also want room correction, per-app controls, routing, or Audio Unit hosting.
Wavelet suits Android users who want to adjust headphone sound using profiles or manual equalizer bands. It may also suit listeners who use one of the documented supported players, subject to any extra setup.