OffgridStem - Split any song into 6 stems — fully on-device, no cloud

👋 Hey Product Hunt! Excited to launch OffgridStem — a stem separation app that runs 100% on your iPhone, no cloud, no account, no subscription servers touching your audio. **What's new in this release:** 🎹 Stem separation expanded from 4 to 6 — added dedicated Piano and Guitar isolation alongside Vocals, Drums, Bass, and Other. Musicians can now pull out individual instrument parts for practice, transcription, or sampling — not just remove vocals for karaoke. 🎨 A reactive waveform visualizer for your exported mixes, with multiple styles (Bars, Mirror, Wave, Dots, Neon) and color themes — so your exports are actually shareable, not just functional files. **Why on-device matters to me:** every second of your audio stays on your phone. No uploads, no servers processing your files. I had an independent network audit done to verify this — happy to share the report if anyone's curious. This started as a simple vocal remover, and with this update it's grown into a fuller music deconstruction and playback tool for musicians and producers. Would love your feedback — what stems or features would be most useful to you next? 🙏