Fitness tracking and notifications are the two "killer apps" for my Apple Watch. It's exciting that Pebble has now added fitness to its existing notifications capability, especially now that they are working with Stanford.

I'd never used a FitBit or similar fitness tracker before getting my Apple Watch, but I had been a huge Garmin GPS watch fan for running and biking in the days before my iPhone had enough battery life to last for a run with GPS enabled.

At first I thought I was mostly going to use the Apple Watch in conjunction with planned activities like running a few miles - I certainly use it for that, in conjunction with Runkeeper - but now I also use the passive activity tracking to keep track of how I'm doing throughout the day.

I won't say that it's strictly because of the watch, but I'm now about as fit as I've ever been, and I think the easy glance over to see where I'm at is really helping with that.

Do any of these fancy fitness gadgets offer data analysis and reports without sending all my data to a remote server? Can't really fathom how few people seem have doubts about sending all their sleep and movement data to god knows who.

I'd really like to see autonomous watches with GPS, providing minimal smartphone functionality (navigation, calls and messages), plus serious fitness tracking.

But at the same time I'm hesitant to wear one of those devices without reasonable guarantees big brother is not collecting data. Therefore, something like AsteroidOS seems ideal: http://asteroidos.org/

This is cool, but can I easily dump and analyze my own data? Hopefully there is some API to foster visualization applications or at least a way to dump it externally. Needing to rely on one or some assortment of predefined apps always makes me feel like it's not my data.