Ear training suggestions

Hello!

any resources or techniques to improve my skills in relative pitch, recognizing chord progressions, and identifying sharps/flats?

I've been using ToneScholar (https://tonescholar.com) if you're interested), and it’s great if you’re a singer. Very user friendly and has totally improved my relative pitch but yeah, better for singers.

I'm specifically looking for advice and exercises, not other apps. Thank you!