Easily one of the most poorly designed apps I've seen on iPhone.
When you plug in your IR Emitter to your phone's Lighting port, a screen pops up to ask what you've connected. The choices include a credit card reader, a pair of earphones, and three other icons, none of which look like the IR Emitter. Icons only, with no labels on them. If you guess right here, then you're prompted to add a device. I selected TV and it showed an alphabetical.list of manufacturers. I selected "TCL" and the screen that followed wanted me to press a "power" button and then hit "usefull" (sic) if it worked and "useless" if not. None of this was explained, by the way. At ty he topit said 1/42, suggesting there were 42 possiblites. Let's call this a code group and each possible selection a code.
I stepped through them all, and when #42 failed, the top line now said 1/30.
That lead to 1/8 then 1/30, then 1/29. I don't know if there were more code groups after that. That's a total of 139 codes. Why not say 1/139 instead of a bunch of different size groups?
The TV turned off when I was at 15/29 or so, but I didn't notice until I had hit "Useless", so I hit the "Back" link at the top of the screen, but instead of stepping back through the numbers, it took me all the way back to the beginning. 20+ minutes wasted. Well, 40+ because it did the same thing on my second attempt.
To paraphrase Steve Jobs, this is insanely stupid.
I know the IR Emitter is working, but so far this has been a waste of time and money because I can't get the stupid app to work.