I’ve got a Fitbit HR and it’s very good for what I want, I’ll be getting the scale soon.
The whole joining forces thing is a bit of a red herring though. Fitbit, MyFitnessPal, Strava, Apple Health and a million others all claim their apps and devices sync with all the others, and they do to a certain degree, but it’s not what you might expect – as someone else said – the Fitbit HR models, don’t sync HR data to Strava – what you can do is use the ludicrously inaccurate calorie counter on Strava to sync output into the frankly appalling calorie counter on Fitbit. I wanted to sync my calories burnt via Fitbit because it actually records how hard you’re working into MyFitnessPal because it’s easily the best for recording how much you’re eating, but it doesn’t do that – it just uses Fitbit as a pedometer instead of my iPhone, which is silly.
In short, they all claim they work together, it helps them sell devices / services, but in reality they do the bear minimum to make the claims – also worth noting, whilst I really like my Fitbit HR, it only really passes HR data to the Fitbit app, and the majority of Fitbits devices, certainly the older ones are primarily pedometers – so it’s very ‘step orientated’ – and steps are a bit of a score thing – they work out your calories burnt with the HR, but you get 5000k steps or something even though your feet barely touched the ground for 3 hours. I asked them about it on live-chat and basically got “yes, they all do that sir” it’s great for competing with your mates on step-challenges, but not much use otherwise – not that it bothers me, I’m not a runner.