TwinViewer is a dual-screen photo viewer application for iPhone that allows users to view two different albums simultaneously. With this app, you can compare two photos side by side, pick the better shot, or delete unwanted photos.

But TwinViewer is not just a viewer. It offers additional features that enhance the photo viewing experience. Users can create side-by-side combined images, allowing them to merge two photos into one. This can be useful for creating collages or showcasing before-and-after shots.

Another useful feature of TwinViewer is the ability to access detailed EXIF data. Users can view information such as image size, shooting date, and other metadata associated with their photos. This can be helpful for professional photographers or anyone interested in learning more about their images.

The app provides a user-friendly interface with intuitive gestures for navigation. You can swipe left or right to browse through the next or previous photo, pinch with two fingers to zoom in or out, and double tap to view a photo in full-screen mode.

TwinViewer is a free app, but there is also a full version available through in-app purchase. Upgrading to the full version unlocks additional features, including the ability to create and save side-by-side combined images, as well as the display of image metadata.

Overall, TwinViewer is a versatile photo viewer app that offers a unique dual-screen viewing experience and useful features for photo editing and organization. Whether you're a casual photographer or a professional, TwinViewer is worth checking out.