Just to give you my experience running Runtastic Pro in my Note3 + Gear2 combo!
It is fantastic to be able to start na exercice directely from my Gear2 with no need to touch my Note3 which stays in my Camelbak.
I start activating the GPS via Gear 2 than I launch AppLauncher in the Gear2 and start Runstastic remotely in my Note3. Then I launch the Runtastic for gear app to start the exercice. So, I don't need to touch my Note 3 and that it is what I really wanted. And I can pause and stop the exercice from Gear2 too :-).

Now I expect Endomondo to follow this please!

paulobao @ portugal