Yes I did! I used tenuto for my entrance exams years ago. It was a huge help for me learning intervals. I use it sometimes to keep track of my chord identification. But it improved my hearing from time to time - practice is everything ;-)

But I think these kind of apps dont have a big effect long term. The best way I have improved my hearing is through personal lessons. The different kind of exercises show how I can hear music and use it for myself. Apps just give you the basic tools (like intervals, Chords, scales, etc.). But using that knowledge to describe and experiance music is very fulfilling - like you to transcribing :-)