Riftone - Split any song into 6 stems on your iPhone

Hi Product Hunt, I'm the maker of Riftone. It's an iPhone and iPad app that uses AI to split a song into 6 stems: vocals, drums, bass, guitar, piano and other. Mute the drums to practice your part, drop the bass to play along, or pull out the voice for a clean vocal. You can also shift the key, change the tempo, follow along with lyrics, trim a section, and export the mix or the separated stems. Songs come from your music library, Files, a link, the microphone or a video in your camera roll, and there are demo tracks to try it right away. The idea was simple: stem separation in two taps, right on the phone, without a desktop or a DAW. If you play or sing along to tracks, which stem do you remove most often when you practice?