TiviMate is the name that comes up constantly in general IPTV discussion, which is why people search for it by name when shopping for an Apple TV 4K app and then get confused. Across a wide spread of r/TiviMate threads, in different phrasings and even different languages, the answer is the same: there is no Apple TV version. This is a settled limitation in that community, not a maybe or a "coming soon." If your search led you to expect it on Apple TV, that's the gap — the fix is picking a player built for Apple's platform from the start, not waiting on a port.

IPTV Smarters has an Apple TV app and is the most commonly cited working option for that platform. It takes a standard M3U or Xtream Codes playlist link — the format your IPTV provider gives you — and loads channels, EPG guide data, and VOD into one interface. Setup is entering the playlist URL or login details your provider supplies, the same information you'd use in any other player. The app choice affects the interface; it doesn't change what channels or VOD titles you get, since those come from your subscription, not the app.

Apple TV 4K can display 4K, but only if the stream itself is encoded at that resolution and your connection can carry it. A 4K stream needs roughly 15-25 Mbps sustained and uses about 7 GB per hour of viewing. HEVC-encoded streams cut that bandwidth need roughly in half compared to H.264 at the same quality, which is worth checking for if your connection is closer to the low end of that range. Anything below about 15 Mbps will drop to 1080p or buffer, regardless of which app you're running.

No — the player is free and interchangeable; the subscription behind it is what you're actually buying. IP4KTV works with IPTV Smarters on Apple TV 4K the same way it works with other players on other devices, since it's a standard playlist connection either way. Plans support 1-5 simultaneous connections and unlimited installs across your own devices, so the same subscription can run on an Apple TV 4K in the living room and a phone in another room at the same time, just not more streams at once than the plan allows. Switching devices later doesn't require a new subscription, only reinstalling the app and re-entering the same login.