VLC (iOS, Android / Free)
Everyone’s favourite video player VLC, which was kicked off the iOS App store, is back now. The open source cross-platform multimedia player popular for Windows, Mac OSX and Linux brings the same sturdiness to smartphones and tablets running iOS and Android. It is capable of running almost all the video formats that you can throw at it. Using the app you can tweak brightness, control playback speed, contrast, saturation etcetera.
PlayerXtreme HD (iOS / Free)
The iPad may be the best device to play video. But playing videos on it is not easy without the help of iTunes and library syncing. PlayerXtreme HD, the best video player for iOS, plays any video file in any format without the need for iTunes. With this app you can transfer and watch movies within minutes without any video conversion. The video library is organised like a library on a computer with the ability to sort the files using different tags and colours.
MoboPlayer (Android / Free)
MoboPlayer is the best video player app for Android. Just like any good video player, it can play any video of any format. Even for subtitles it goes a long way than the other players and supports SRT, ASS, SAA and built-in subtitle formats like MOV and MKV. One of the best features of MoboPlayer is the ability to control the various aspects of the video like brightness, playback position, and volume without ever bringing up the controls using the built-in gestures.
GoodPlayer (iOS / Rs 170; Android / Free)
GoodPlayer, the video player app ranked number one on the Apple App store in many countries, prides itself on its ability to run any file format, to download movies with the built-in browser and downloader, and to stream movies. Use of gestures goes much farther than MoboPlayer and can be used such tasks like pause and play, and turning subtitles on or off. Unlike other video players you get support for TV/VGA out, HDMI TV-out ,Video Mirroring and AirPlay.