RiffTrax Sync is a free Android application developed by RiffTrax, which allows users to sync commentary tracks with their favorite movies or TV shows. The app is from the creators of Mystery Science Theater 3000 and is designed to make movies more fun by adding hilarious commentaries. The app syncs perfectly with movies, and its compatibility feature is impressive, as it can recognize movies from Netflix, iTunes, Amazon Video, DVDs, Blu-rays, your TV, computer, and other streams.

The RiffTrax Sync app is easy to use. It uses your device's microphone to listen to the movie, and then it automatically synchronizes the commentary to play along with perfect timing. The app is perfect for fans of blockbuster films like Twilight, Jurassic Park, Star Wars, and more. However, it's worth noting that the app is only for commentary tracks and not for the actual movies or TV shows.

Overall, RiffTrax Sync is a great app for anyone who loves watching movies and wants to add a bit of humor to their movie-watching experience. The app is free, and the compatibility feature is impressive, making it worth checking out.