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Why Aren’t My Sleep Nights Syncing?

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no sync? Charge 5 and iPhone 11 Pro Max. I wear my watch every night. 

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Welcome to the Fitbit community, @mmartiak!

Sad to hear that you're having issues with your Charge 5. Please make sure your iPhone is running iOS 15 or later to meet Fitbit's current system requirements:

Fitbit System Requirements 

Stefan
Charge, Charge HR, Blaze, Versa, Versa 2, Charge 5, Charge 6, Versa 4, Aria, Aria 2, Pixel 4a, Pixel 7
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