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Level 1

4 points

Back of case

What does it indicate when the back of the case lights up (red) for a few seconds in the middle of the night?

iPhone 5s, iOS 12

Posted on Apr 6, 2023 2:06 PM

Top-ranking reply

Level 10

104,761 points

Posted on Apr 6, 2023 2:42 PM

Please refer to the post by Chris_V89 in What is the red light under my Apple Watch?, which explains "...this light is used to help measure your heart rate and blood oxygen."

Be sure to read the entire post for additional details.

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