About Aer
Aer is a family-owned breathwork app by Marin Labs — built by a husband-and-wife team in Marin County, California. It turns science-backed breathing techniques into a calm, guided practice you can use anywhere — to sleep better, sharpen focus, and ease stress. All it takes is a minute.
Why we began
Aer started from a simple frustration: most breathing apps were either too bare-bones or too cluttered. The team behind it wanted something in between — every breathing technique that actually helps, and none of the extras that get in the way. They were after better sleep and sharper focus for themselves, and figured they weren’t the only ones who’d rather breathe with a little quiet guidance and nothing more.
So they built one. Aer guides you through 15+ exercises — including 4-7-8 breathing, box breathing, and the physiological sigh — with visual guidance, optional audio, and gentle haptics, all completely offline. And where most apps give everyone the same exercise, Aer can tailor the length of each breathing phase to you, using a simple CO₂-tolerance check as a rough guide to your lung capacity. Prefer the classics? Turn it off — Aer is beginner-friendly either way.
Try Aer
Aer is free to try — no ads, and we will never sell your data. It’s available on iOS and Android in 20 languages. Start a breathing session today.
Aer supports your wellbeing but isn’t medical advice or a substitute for professional care — see our disclaimer. Questions? Reach us at hello@aerbreathwork.com.