Neutron Music Player for Android. Yes the UI is outdated, but the efficiency and feature set cannot be beat. It’s so efficient on battery life compared to both streaming music services like Spotify, or any other local music player Android app. And the feature set is incredible. The full parametric equalizer, built in frequency response correction for almost any headphone model you can name, volume normalisation, EQ presets, direct USB access to USB DACs to bypass Android volume or format limitations, crossfeed for headphones, and that’s just what I can think of now. I’m sure there are more features I haven’t even used yet.
Chiropractors. It’s pseudoscience. Maybe it’s not the most unique opposition from me as I know some others dislike chiropractors, but I think it’s wild that medical aids or health insurance will literally pay for their client’s appointments with these modern day charlatans, while denying payment of scientifically proven treatment options.