Calm down in 2 minutes.

From sign-in to calm.

Tap the phone or pick a step to walk through the app.

One swipe to the right breath.

One thing: how long you hold your breath after a deep inhale. Each second held takes a year off, counting down from 80. That's the whole formula.

This is not a medical test and it can't diagnose anything. Real lung function is measured by a clinician with a spirometer. Breath-hold time moves with practice, altitude, caffeine, sleep and stress — a short hold isn't a diagnosis, and a long one isn't a clean bill of health.

• Sit or lie down. Never in or near water, in a bath, or while driving.
• Let go as soon as it feels uncomfortable. Holding to your limit doesn't make the result more accurate.
• Stop and breathe normally if you feel dizzy, lightheaded or tingly.
• Skip it if you're pregnant, or have a heart, lung, blood-pressure or seizure condition — ask your doctor first.

Your breath, your rhythm.

Three steps from a goal to your own exercise, pinned first on Home.