Oojao Image Viewer is a multi-format image viewer, for opening image files. You can easily view all your photos and pictures on the phone.
Adjusting brightness, contrast and saturation. View your gallery, set as wallpaper, flip and share with your friends!
This app is ad-supported to keep it free, but ads are not annoying and can be quickly closed or temporarily turned off in Settings. And there are no ads while editing!