Gacha Animator - PocketVideo is a free video manager and video merger app that brings together multiple clips into a single video. It's designed to make creating videos easier by providing multiple editing tools such as merge videos, add effects, insert music, and more.

It allows you to add various clips, images, and music to a video, and also allows you to do advanced editing on them. It's simple to use and lets you add different audio clips, adjust the volume of each one, and set the image as the background.