I am using this player from 5 years this is really a great app by J2 interactive their is many usefull features like ( 1) add subtile which is my favroite feature. their is also option to speed up and down acording to video for subtile ( 2) kids lock is also my favroite feature ( 3) H/w & S/W decodrs also is a great feature which help in increase sound and video quality. Layout and design of mx player is also great. there are also many hundreds of feature in this app. I love this app too much which help me watching my favorite serial with subtitle .