The most important function of smartphones based on the system Android, along with regular phone calls and Internet surfing, is the playback of video and audio files. One of the advantages of the device is a large number of free applications that are easy to install on the device yourself.
Variety of programs
Applications differ in interface, customization, and the number of playable formats. Some utilities are better suited for smartphones, while others are better suited for tablets. It remains only to choose the optimal program that meets your needs.
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Ultimate (HD)
Video Player Ultimate (HD) is a universal tool for watching videos in any format. Has a powerful yet easy-to-use interface. After installation, the program itself finds files suitable for playback on your phone. Key features:
- subtitle support;
- the ability to hardware accelerate for HD viewing;
- the ability to control gestures;
- optimizes device memory;
- there is a history of playing files;
- headset tracking;
- ten-band equalizer;
- screen sleep timer.
Another advantage of this application is its small size, which allows it to start quickly.
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Video Player
Another free app for Android a is Video Player. It is also 'omnivorous' thanks to its codec support. However, this makes the program somewhat heavier. Suitable for watching HD format, also supports subtitles. An equalizer is provided to adjust the sound when listening to music files. With built-in mp3 cutter editor you can create ringtones. 
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KMPlayer
And finally, KMPlayer. It supports most of the existing video formats thanks to its large number of built-in codecs.
Differs in the ability to customize the screen. It can be used to view incompletely downloaded files. There is a function of acceleration-deceleration of playback while maintaining the tone of the sound. Features:
- you can easily manage folders (move, copy, rename, delete);
- control with gestures is possible;
- playback of file fragments is possible;
- you can include a video in miniature (not full screen);
- suitable for streaming video playback.
As you can see, free programs for smartphones allow you not only to watch videos and listen to music, but also much more. Thanks to them, the device becomes a truly multifunctional device that changes your standard of living and allows you to keep up with the times.