looking for a free photo editor check this out PIXLR android - https://play.google.com/store/apps/details?id=com.pixlr.express&hl=en PIXLR ios - https://itunes.apple.com/in/app/autodesk-pixlr-photo-editor/id526783584?mt=8
This video covers how to blend two images together to create a double exposure. It uses blending modes and opacity to change the effect of the picture. The video is part of the Pixlr Power online tutorial course, hosted at udemy.com; an online education program.
Here is a discount coupon for this course - $28.00 for 53 video lectures, worksheets and projects. https://www.udemy.com/pixlr-power/?couponCode=PixlrYoutube
See the full in-depth review here: http://youtu.be/_AuigPtMWPk
I know Instagram is all the rage these days, but for quick and complete photo transformation, Pixlr-o-matic is better, and since you can share photos from Pixlr-o-matic straight to Facebook there's no need for that other app! Pixlr-o-matic has hundreds of filters, lighting affects, and frames allowing you to quickly and easily make that boring picture look amazing before sharing it on Facebook or any other site.
Pixlr-o-matic is available for FREE on the Google Play Market here: https://play.google.com/store/apps/details?id=pixlr.OMatic