O₂ Buddy: Blood Oxygen

4.5 stars40 reviews$0.99

4+Version 1.3Updated 4/10/2026, 8:29:00 PM

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Stay on top of your health with BloodO₂ — the fastest, most seamless way to view your blood oxygen readings. • Clear charts, instant data – See your latest 25 readings in real time, stored and synced instantly from HealthKit. • Always up to date – As soon as a new SpO₂ sample is recorded, it syncs to your Apple Watch for immediate viewing. • Daily averages – Compare Today vs Yesterday at a glance to better understand your wellness trends. • Designed for Apple Watch – Lightweight, fast, and glanceable. • Private & secure – Data stays on your device, only using Apple’s secure HealthKit storage. Perfect for anyone tracking sleep, fitness, or overall wellness, BloodO₂ makes your oxygen readings more accessible than ever.