Merging several photos into one is an easy task with a photo editor that allows you to create a photo collage.

But if you need to remove background details of an image, make them transparent and place the foreground onto another image, it will be more challenging.

Thankfully there are apps that can make this seemingly difficult task a lot easier even on a small mobile device.

One of such apps that are welcome by most mobile users is Background Eraser, which is equipped with three editing modes for ease of making background transparent.

After removing the background, you can then impose the foreground perfectly onto another photo with any image editor that can merge layers, such as PicsArt Photo Studio, the Editor's Choice at Gizmo's Freeware.

Background Eraser is free and well worth a try although supported by ads.  http://www.techsupportalert.com/content/get-popular-mobile-app-make-image-background-transparent-easily.htm