Re: Go Samsung!
"and a tonne of other stuff as I develop the app!"
That's nice. You really should put that at the top as responsible disclosure, especially as it's payware with a bunch of not-very-good reviews. (https://www.explainxkcd.com/wiki/index.php/1098)
Personally I use Anymote as it's the _only_ app which will control my cheap'n'nasty UMC tv and it works with the IR emitter on my Note 4. Although I paid for mine, it's not time limited.