Setup image galleries in a jiffy via shortcodes specifying image slugs, and have the images load in a jiffy by downloading only the minimum size image necessary for the client viewport size. Images are rendered as large as possible within the viewport when expanded. No locked premium features, and tested to work on iOS devices. Demo at: http://www.maratbn.com/projects/jiffy-gallery-press/#demo Official project URLs: https://wordpress.org/plugins/jiffy-gallery-press https://github.com/maratbn/JiffyGalleryPress http://www.maratbn.com/projects/jiffy-gallery-press