Breathing Pacer
Follow the shape. No sound needed, no account, no streaks — open it when you want it, close it when you're done.
Pick a pattern and press start.
Notes
Reduced-motion preference switches the animation for a steady progress ring with the same timing. If holding your breath (box, 4-7-8) feels wrong for your body, stay with the coherent pattern — holding isn't required for the calming effect. Nothing here tracks you, notifies you, or grades you.