Saturate – Effective O₂
Oxygen in the air around you
Price history
About
This app transforms your Apple Watch into a live oxygen meter, displaying the effective oxygen percentage in the air around you. It's ideal for outdoor activities at varying altitudes, providing real-time data on air pressure, altitude, and oxygen levels.
What's New in Saturate
1.0
July 15, 2026
FAQ
What is Saturate?
Saturate turns your Apple Watch into a live oxygen meter. It uses your watch's barometer to measure air pressure and convert it into the 'effective oxygen' percentage, showing you what each breath delivers at your current altitude.
Is Saturate a medical device?
No, Saturate is not a medical device. It measures the oxygen in the surrounding air and does not measure blood oxygen (SpO₂). It does not diagnose, treat, or provide medical advice.
Does Saturate have ads?
No, Saturate is ad-free. The app is designed with privacy in mind and does not contain advertisements or analytics.
What devices does Saturate support?
Saturate is designed for Apple Watch and can be used independently without an iPhone installation. It also supports iPhone and iPod for related functionalities.
How does Saturate calculate effective oxygen?
Saturate uses the barometer on your Apple Watch to measure ambient air pressure. This data is then converted into the 'effective oxygen' percentage, which is the sea-level equivalent of the oxygen delivered by each breath.
Can I see my altitude with Saturate?
Yes, Saturate displays a live altitude scale from sea level to 29,000 ft, with a marker indicating your current position. It also shows your current altitude and air pressure.
How often is Saturate updated?
Saturate was last updated on July 15, 2026, with version 1.0. The app is designed to keep readings fresh throughout the day via watch face complications.
What are the benefits of using Saturate for hikers and climbers?
For hikers and climbers, Saturate provides crucial awareness of the decreasing oxygen levels as altitude increases. This can aid in acclimatization awareness and understanding the air you are breathing during strenuous activities.
