I mentioned this in another post I use my sub with tivimate on the firestick and a high spec android box.
In the firestick only some channels show as 50fps, whereas on the android all of them show in 50fps. So how reliable is tivimate in regards to checking the fps, according to my experience the hardware plays an important role.
If I didn't have a firestick and only used my android box I would be shouting from the rooftops about my 50fps channels lol. And vice versa if I only had a firestick id be thinking why can't I have 50fps like everyone else.
But as i have both it seems the hardware plays some part in whether or not tivimate playsback in 50 or 25fps