iPhone Fitbit blaze sync

Hi b117watt,

Thanks for reaching out in Apple Support Communities. I understand you're having some trouble with syncing or connecting your iPhone with your Fitbit Blaze, specifically messages. I can know it's important to be able to use accessories with your iPhone; I'd like to help. I'd suggest starting with the steps in the following resource, while the title may not match your exact issue, the steps may help: If you can't connect a Bluetooth accessory to your iPhone, iPad, or iPod touch

If you continue to have trouble syncing your Fitbit with your iPhone, I'd suggest reaching out to Fitbit for further assistance: Fitbit Help - Blaze

Best Regards.