Neat, clean app that brings a functionality that should be built into iOS – OK for iCloud - Transfer images & videos - iPhone version Review

One key feature iOS lacks is the ability to upload photos from your device straight to your iCloud Drive. With this app you can browse your camera roll and pick specific photos to upload to an iCloud Drive folder. This will be a life saver for me.
Review by David1016 on OK for iCloud - Transfer images & videos - iPhone version.