UnderSurface is a journaling app where inner voices respond to your writing in real time. You type. You pause. An inner part reacts. It may notice what you're avoiding, sit with you in discomfort or connect dots you haven't seen yet. It's not a chatbot or a therapist. It's a writing companion. It works in any browser and is multilingual. Strict privacy, export and account controls. Built as a solo project because I kept abandoning my own journal entries the moment they got real.