A Breathing Analysis Nose Clip is a lightweight plastic or silicone tool that fits over the bridge of your nose and lightly seals each nostril. Inside its slim frame hide miniature flow meters and gas‑sensing chips. These parts notice how fast air moves, how much air moves, and what gases—like oxygen or carbon dioxide—ride along. Smart versions also link to a phone app by Bluetooth. The app draws live charts, stores daily logs, and even sends a quick alert if your pattern shows stress, fatigue, or risk of illness.