Interesting discrepancy between Atkins and FitBit food logging?

I found that Fitbit does not track sugar unless you pay for the premium option.  So I have continued to track using Atkins also.  I find the two have some big difference between carbs and cals, even when I make sure I select the exact same foods and amounts...  Hmmmmmmmm

FITBIT

Have you tried my fitness pal?

Years ago.....  My go to has been lose it and when I had some regain I turned to atkins plan.  Low carb, high protein.  My fitbit I had just would not sync so I returned it.  When I got my new one of course you start tracking using it to sync with your moving.  For some reason I kept tracking using Atkins and noticed the carbs and cals were very different.  LOL I guess it's like anything else.  Find what you like and stick with you.  

Thank you for your suggestions!  Have a great weekend!

My Firness Pal does sync with Fitbit if you're interested. Just as an FYI. 

There is an add on you can put on my fitness pal so it shows net carbs. I follow this woman on FB --Lynne the low carb traveller. She turned me on to it.