First off, let me state that for a photography site/app, the Flickr app excels at the primary purpose, which is showcasing excellent photos. Its very easy to navigate, and browse photos. However, the other social aspects of flickr, such as discussions and commenting are lacking when compared to the website. It takes multiple steps to view the original photographers notes, and also to leave a comment, if you start with viewing just the picture. Discussion topics are entirely non-existent in the app, forcing you to go to the website.
Pros:
- Showcases photos, front and center
- Navigation between groups, albums, and an individuals photos is pretty seamless
Cons:
- Lacking some social content that requires visits to the website
- Lacks an ability to clear the cache, leading to some massive file space usage after a couple months of use.
Zack86 about Flickr, v4.3.0