NFL Plus sure doesn’t make it easy for you to watch all games across all devices. While yes, you can watch NFL games on NFL Plus subscription, it comes down live games and game replays. Click here for more info on NFL teams & logos.
The short answer is that you watch all live preseason games and replays (but your market games are only available on your phone and tablet), live regular and post season prime time games, and regular season game replays and condensed game replays across all of your devices. However NFL Network is available so any games shown on NFL Network you can watch. You can also watch live Sunday action with NFL RedZone, so while not full games, you will be watching non-stop action from around the league.
Is it worth it? or a full breakdown of NFL+ subscription plans and what you can watch, read NFL Plus review.