Geordon wrote:Eeyore wrote:nhshorty wrote:I have a FitBit and remove it from my pants and pop it into my pocketbook when I go through Security. Never have a problem. On one of our trips I logged 7 - 8 miles each day! 
Thread hijack! Nhshorty...how do you like the FitBit? Does it just track your mileage each day? Does it connect to a smart phone? Thanks!
To answer the OP: The FitBit is just like any other personal electronics when going through TSA. Pop it into the X-ray tray and pick it up at the other end, you'll be fine.
Eeyore, I have the cheapest, fewest featured FitBit that is made: The FitBit Zip. It tracks the number of steps, the mileage, and the number of calories burned based on activity + sex and BMI. Check out the sort of things that it can track on my account: https://www.fitbit.com/user/2595XT. I'll be the first to admit that I don't use the FitBit app nearly to it's fullest measure, I just use it as a simple step counter. Once you have the FitBit set up, it will reset the counts to zero ad midnight every day, and it stores as much as 7 days worth of data before it starts rolling off of the device.
My FitBit links with my iPhone 5 perfectly, through Bluetooth. I was not able to get it to connect through my (unsupported) Android phone before I upgraded to the iPhone. If your phone has "Bluetooth Low Energy (BLE) capability, you should be able to use it just fine.
I love my FitBit. I work in retail at the moment, and since I got the FB in 2013, I've walked over 1000 miles. No wonder my feet hurt when I get home! 
If you want to manage it through your computer or if your phone is unsupported, there is a USB dongle in the package, and you just need to download the free software.
Wow. Thank you so much for sharing! I have been eyeing this little gadget for a while, but have not personally spoken to someone who has used it. This has kinda helped me make my decision. What retailer did you purchase yours through?