I couldn't figure out why my Note3 wasn't installing any apps until this: A great post in the Verizon Note3 forum:
I picked up the Gear 2 yesterday and I'm loving it so far, the only problem I have had was installing apps through the Samsung Apps link in Gear Manager. It was wrecking my brains all day, but I figured it out.... I reinstalled Samsung Apps through this link Samsung Apps (Pick the one for phones. Don't do the tablet one!) After that, no problems other than the barren appstore.
I hope this helps someone, if not at least it helped me. Be blessed.