The vibrating alarm doesn't come from your phone. The Fit Bit itself will vibrate on your wrist.

I actually use an app called My Fitness Pal. here you upload everything you eat or going to eat if you want to check the amounts BEFORE you eat them, to keep track of sugars, carbs, cholesterol, basically anything. My mom is diabetic and would occasionally stop for Culver's custard. She would get 2 scoops with strawberries. Her and my grandma. She has to watch her carbs, so after looking it up on my app, she realized that those 2 scoops had 77 carbs in it. NOT so great for her!! I would recommend getting that app if at all possible. I will tell you everything you need to know about any restaurant's food items. If you're buying from a store, it has a scanning option. you just scan the bar code and it gives you alls the info at a glance.