Photos Viewer Companion is an Android plugin developed by SM Software that allows users to transfer image files from their phone to their Samsung Gear smartwatch. This companion app is designed to work with Photos Viewer, a photo viewer app for Samsung Gear smartwatches.

With Photos Viewer Companion, users can enjoy all the common functions of a photo viewer, including slideshow, fullscreen, zoom, and changing photo orientation. The app is free to use and can be easily downloaded from the Google Play Store.

To transfer pictures from your phone to your watch, simply enable Bluetooth connection for both devices. Open Photos Viewer on your watch and select "Share via" on your phone. Choose Photos Viewer Companion from the list of applications and the transfer progress dialogue will appear on your watch.

To check whether your phone is connected to your watch, open Photos Viewer on your watch and click on the app logo icon or title area at the top screen. Look for the line "Connected to phone" and ensure that it says "Yes". If it says "No", enable Bluetooth connection for both devices.

Overall, Photos Viewer Companion is a convenient tool for Samsung Gear smartwatch users who want to easily transfer images from their phone to their watch.