No you can't use the Pebble app's and yes it does work like a standalone watch , you can even completely shut down Bluetooth. Till now I'm quite impressed with the little guy. I'm now used to being able to see all my notifications on it and to control the music player. Pedometer is also kinda cool and the data syncs to the phone app.
Are the spec's exactly the same as the pebble with all the sensors and GPS?
The 10 day battery life is just fantastic.
Thanks for the info'