I've been looking but only found mkiptv which is ok but there isn't a guide. I'm setting this up for my dad who would like that feature. Even if it's not free I'll still take a look at it.
Edit: I also know about iptv iptv smarters but logging in with that doesn't seem to work.
Edit 2: Just found out that the green button actually shows a guide for the channel you're highlighting. Still would like to find other apps to try.
Your best option is to use a separate device. Smart tv’s platforms (app stores) are not paid for by the subs and thats why they do not work (iptv smarters in the webos is an example)