Had an issue where it was not syncing and only showing the temp. I wanted to have it fixed before vaycay and with reading the reviews I have fixed it. If you are having issues, try deleting the app and redownloding it. You have to set it up again but I think thats what fixed mine. Its a little slow to update with Fitbit but thats a minor detail. I am loving my thermos and would recommend it to everyone. Ive got it covered in stickers from Redbubble.com. Like in my last review of get this over the MyHydrate. That thing sucked. Water got into the battery and it broke. Not worth the hassle to send back.