Aside from the free terabyte storage, which takes longer to back up photos compared to Google Photos, this apps shared photos from the folks around the world make for great viewing inspiration. I come to flickr to look for places Id like to travel to someday. As for the app itself, the UI is great and easy to use. The one complaint I have is it tends to use up so much processing power that my iPhone 7 Plus runs hot.
Zubakhan about Flickr, v4.3.0