SoundTree is a personal audio recorder and organizer with an emphasis on bookmarks. Everything stays on your device - no accounts, no cloud, no tracking, and no network permission at all. Record high-quality M4A audio with a live scrolling waveform, pause and resume without starting a new file, and save from the notification while your screen is locked. Drop marks during recording or playback to flag moments worth revisiting. Sort recordings into a hierarchical topic tree, nested as deeply as you like. Back up automatically to an external drive or USB device. Also supports audio-passthrough to earphones for monitoring audio inputs.