scanner for iphone

SO i got my first IPhone...,, I know there is an app to scan labels... but cant find it.. and which app do u use on your phone to track everything, weight , calories  ect )

thanks in advance!

I use Myfitness.com. 

I think the above meant myfitnesspal.com I use this on my phone

Sorry, I did mean, myfitnesspal.com.  Thanx

 do you mean a QR code scanner? they have them on the app store.

 P.S.
Envy! :)

 I like myfitnesspal the best and it's a free app. You can also scan items you are eating and it will put it on your daily intake. 

Thanks... I am checking out both , myfitnesspal and fat secret which i have been useing on my pc and found they do have a app that scans also... so for eather how do u adjust the amount (im almost a month post op) to the amount u accualy eat when u scan ?

BTW...I have to say I love u all for the support and info you share . It helps so much to know you can come here and got the support we need

 myfitnesspal will let you put in 1/8 of a serving or 1/4 so that would probably work for you at least at first when we eat so little.

 I use Sparkpeople and you can use it on your iphone, just go  to the market for both and type in scanner it  should just come up!