This app is an advanced picture edit app. It is very easy to use but own advanced functions.
Double click on the image, you will open a panel to edit the image.
1 zoom in, zoom out, crop, rotating
2 save to different formats such as jpeg, png, icns, pdf, bmp etc.
3 many effects including B&W, Sepia, Antique, Fade color, Sharpen, Color Invert etc
4 many adjust parameters including Exposure, Contrast, Saturation, Temperature, Tint, Sepia and Sharpness
Have a try now!