PicViewer

Pic Viewer can be used as the default image viewer on Android. Pic Viewer has a basic Gallery view of image thumbnails, and a button that allows you to cycle through the three common image directories on your device. When a image thumbnail is clicked on a configurable Zoom image detail window will come up with that image (pinch-in/pinch-out gesture aware). In the Zoom detail view when you click the configure gear in the toolbar some settings for the zoom view will be displayed and a set of image rotate buttons will be toggled in the display. Pic Viewer allows you to zoom the image around 8x (compared to most apps 2-3x zoom). The app can be associated with your "Share As" , "Send To", or File Manager "Open As" as the default image viewer.

The common image folders on Android that Pic Viewer uses: DCIM (your camera photos), Downloads (items saved from the browser) and Pictures (default screenshots and picture images). When an image is opened from a file manager app from a custom directory location all images in that directory and below are shown in the gallery custom view.