Best SmartWatch for fitness tracking

Hello,
I am looking for a smartwatch for fitness tracking. I would like to have the following features:
1. A good heart rate monitor that will work when you are sweaty in the gym.
2. Should integrate with myfitnesspal.
3. Should integrate with OnePlus 3 android phone.
4. Ability to pay at grocery stores.
5. Ability to use apps from Google playstore.

Bonus:
1. Would be great if it has a barcode scanner so that I could scan what I am eating straight to myfitnesspal.
2. Ability to get...

Best SmartWatch for fitness tracking

from Android Authority Forums https://ift.tt/2JJjy6D
via IFTTT