Estua makes calm, ever-changing ambient sound for sleep, relaxation, focus, and recovery — synthesized in real time, right on your phone. It never loops, never needs an account, and never streams. The result is sound that stays gently new for hours and is yours alone. WHY ESTUA IS DIFFERENT • Certified never-repeating. Every second is a deterministic dynamical-system trajectory, not a looped track — and the engine can emit a machine-checkable certificate that the music provably never repeats. The ∞ in our name is the whole idea. • 100 auto-evolving styles. Turn on Living mode and the music continuously, seamlessly morphs from one style to the next, so a long session never feels static or repetitive. • Fully on-device & private. No account, nothing streamed, no tracking. Anything personal — including optional biometrics — stays on your phone. (Privacy label: Data Not Collected.) • Save and replay, exactly. Loved a session? A short seed re-creates the exact same sound, note for note — bit for bit, even years later. No other generator offers this. FOUR MODES, ALL CALM AND POSITIVE • Relax — a warm, intimate chamber to wind down in. • Recover — an open, temple-like space to reset. • Sleep — a deep, enveloping cocoon for drifting off. • Focus — a steady, uncluttered room for deep work and study. Estua is made to feel calm and quietly uplifting — never dark, never sad.

Estua makes calm, ever-changing ambient sound for sleep, relaxation, focus, and recovery — synthesized in real time, right on your phone. It never loops, never needs an account, and never streams. The result is sound that stays gently new for hours and is yours alone. WHY ESTUA IS DIFFERENT • Certified never-repeating. Every second is a deterministic dynamical-system trajectory, not a looped track — and the engine can emit a machine-checkable certificate that the music provably never repeats. The ∞ in our name is the whole idea. • 100 auto-evolving styles. Turn on Living mode and the music continuously, seamlessly morphs from one style to the next, so a long session never feels static or repetitive. • Fully on-device & private. No account, nothing streamed, no tracking. Anything personal — including optional biometrics — stays on your phone. (Privacy label: Data Not Collected.) • Save and replay, exactly. Loved a session? A short seed re-creates the exact same sound, note for note — bit for bit, even years later. No other generator offers this. FOUR MODES, ALL CALM AND POSITIVE • Relax — a warm, intimate chamber to wind down in. • Recover — an open, temple-like space to reset. • Sleep — a deep, enveloping cocoon for drifting off. • Focus — a steady, uncluttered room for deep work and study. Estua is made to feel calm and quietly uplifting — never dark, never sad. MADE TO FIT YOUR DAY • Pick a goal in onboarding and Estua starts you in the right place. • Gentle bedtime reminders, and a long sleep timer that fades out softly. • Log mindful minutes to Apple Health, keep a daily streak, and see your listening stats. • Start a session hands-free with Siri Shortcuts and Home Screen widgets.