We have developed the populair iOS app myTifi, to control your Samsung Smart TV.
Some App Store feedback of more than 3,500,000 users:

5 stars
Geepee1952: “It just simply works. It finds the TV quickly every time and has been 100% reliable.”

London Tony: “Easy and fast to set up. Channels sync perfectly between iPhone and iPad. Excellent developer support.”

Portgordon: “Brilliant. I have far greater control of my J-Series 2015 TV with this app than I get with Samsungs own app (finally I can switch sources!) and this app looks better too. iCloud sync between devices is a nice touch too. Excellent that you get to try before you buy too.”