A free app for Android, by MediaphileStudio.

Video Cutter is an amazing app for Android that allows you to edit videos in the most effective way. This tool lets you cut out videos accurately without a watermark as well as change their aspect ratios. It also supports the most popular video formats such as MP4, AVI, FLV, MKV, etc. In addition, you can convert your videos to MP3 music through the app. 

Video Cutter comes with a simple, clean, and user-friendly interface, which makes the app easier to use and navigate. It won’t require advanced technical knowledge to be able to use the app.

You can download the app on your device completely free.