My app to measure pulse oximetry is rejected by Apple

Question

I made the free app to measure the oxygen level in blood using a phone's camera.

Apple rejected app said this:

Guideline 1.4.1 - Safety - Physical Harm

We noticed that your app claims to take health measurements using only iOS device sensors, which is not a functionality these device sensors support.

Specifically, your app claims to measure a user's bloody oxygen saturation.

Next Steps

To resolve this issue, please remove any unverified health measuring functionality from your app that uses the device sensors.

Alternatively, you may submit documentation in the App Review Information section in App Store Connect that clearly discloses data and methodology to support accuracy claims relating to these health measurements. If the level of accuracy or methodology cannot be validated, we will reject your app.

What documentation I have to submit?

Answer 1

Sounds like you need to conduct some tests using a real pulse oximeter, and your app, to show that your app gives similar readings to the pulse oximeter.

The tests would need to be thorough enough to convince a sane person that your app is decently accurate compared with a real pulse oximeter.

Apple needs to know that your app is accurate before it allows people to use it.

Basically you need to do some science ⚗️. For example, multiple tests on a number of different people of varying health / age / skin tone. Document your experiments. Attach the findings. Apple wants to see that.