So Alexa changes Tv/Radio channel for you, boils your kettle, adjusts the heating, checks who's at the door, answers your phone, switches on/off your lights sockets etc etc etc, then you ask Alexa to check in with your Fitbit to see how sedentary you are :/
I've asked to Amazon to price match as it's their product and they also sell Charge 2 Large. They don't sell as a bundle, but they might set up one to price match Currys. Maybe they don't know it works with Echo's. :p
Yes to echo and any fitbit...check this out www.tomsguide.com/us/connect-fitbit-to-amazon-echo,review-3474.html
Do the Fitbit and the Dot work together if you have both of them?