O2 Buddy: Blood Oxygen SpO2

O₂ Buddy makes your blood oxygen readings effortless to see, understand, and track - on your iPhone, your Home Screen, and your wrist. Your Apple Watch already measures your blood oxygen throughout the day and night. O₂ Buddy turns those readings into something you can actually use. SEE YOUR TRENDS • Switch between 24 hours, 7 days, 30 days, and 90 days with a tap • Every day shows its full range alongside its average, so you see the whole picture - not just the last number • Watch your average rise or fall compared to the period before DAY VS NIGHT • Compare your daytime readings against your overnight ones, side by side • Wear your watch to sleep and see how your oxygen behaves while you rest EVERY READING IN CONTEXT • Tap any reading to see where it falls within that day • Compare it against readings taken around the same time on other days • Know instantly whether it's normal, below normal, or low ON YOUR WRIST • A fast, glanceable Apple Watch app with your recent readings and 7-day trend • Complications in circular, rectangular, corner, and inline styles - including a color-coded gauge ring and a 7-day trend sparkline • Readings sync from your iPhone as soon as they're recorded ON YOUR HOME SCREEN • A widget for your latest reading • A widget for your 7-day trend LOW OXYGEN ALERTS • Optional notifications when a reading falls below a threshold you choose PRIVATE BY DESIGN • Read-only access to Apple Health • Your data stays on your devices - never uploaded, never shared, never sold Also includes Light, Dark, and Automatic appearance, 12- or 24-hour time, and built-in FAQs and support. O₂ Buddy is not a medical device and is not intended to diagnose or treat any condition. Blood oxygen measurements are recorded by Apple Watch and stored in the Health app.