The Detroit Lions games can be watched on several apps and platforms depending on the day and the broadcaster:

• For Monday Night Football games (like the recent Lions vs. Ravens game), they can be streamed live on the ESPN app and the ABC app or website with a TV provider login. The game was also available to stream on services like Fubo and DirecTV which often provide free trials for new users.

• Locally on Sundays, Lions games may appear on CBS, FOX, or NBC apps depending on the game broadcast network.

• NFL+ app also streams Lions games live but is available for mobile devices only.

• Other options include streaming via NFL Sunday Ticket on YouTube TV, NFL Network, or using the official Lions iOS mobile app for in-market fans.

• DAZN also offers live and on-demand streaming of Lions games, available internationally.

Therefore, the best apps to watch a Lions game are typically ESPN for Monday Night Football, CBS/FOX/NBC (via their apps or cable providers) on Sundays, and NFL+ on mobile. Streaming services like Fubo, DirecTV, and YouTube TV also provide access depending on the game. For free trial options, services such as Fubo and DirecTV are good choices to try out.