Download this app if: you're looking for a simple way to edit a video.
VidTrim is a video editor and organiser for Android. It includes multiple features like trimming, merging, frame grabbing, video effects, extract audio (convert to MP3) and transcoding (compress and convert to MP4). You can also share your videos with your friends directly through the app.
Video trimmer — Price: free Pros: does what it says. Very simple to use. Save the clipped part as a new file or replace the existing one. Cons: none