Saturate

Support

Help and contact for Saturate. Most questions are answered below — and you can always email us directly.

Contact

Need help or have feedback? Email info@sapphireprismlabs.io → and we'll get back to you.

Frequently asked

What does the percentage mean?

The big number is the effective oxygen % — the sea-level oxygen concentration that matches what you're breathing now (about 20.9% at sea level, dropping as you climb). You can also switch to “% of sea level,” where sea level is 100% and the value falls with altitude.

It just shows a spinner / no reading.

Saturate uses the Apple Watch barometer for the live oxygen reading. On models without one — including the watchOS Simulator — it relies on GPS altitude, so make sure Location is allowed for Saturate (on your iPhone: Watch app → Saturate → Location).

Does it measure my blood oxygen?

No. Saturate measures the air around you, not your blood oxygen (SpO₂). It is an informational tool and not a medical device.

Does it need internet?

The oxygen reading is computed on your device from barometric pressure, with no account, ads, analytics, or developer servers. GPS altitude is used as a fallback when barometer data is unavailable. If Location is enabled, Apple's geocoding service may use the network to show a nearby city/place name.

Which devices are supported?

Saturate is an Apple Watch app. The live reading uses the built-in barometric altimeter found on Apple Watch Series 3 and later; without a barometer it falls back to GPS altitude.