Undulate turns your phone into a breathing coach with 5 handcrafted animated worlds — not generic expanding circles. Each mode maps to a real technique: box breathing (Navy SEALs), 4-7-8 (Dr. Weil), extended exhale, and more. Haptic feedback lets you feel the rhythm without watching your screen. 2 modes free, unlock everything for $4.99. No subscription. No account. No data collected.