The missing file picker in iOS

Neither then, nor now, am I asking for a user-accessibile files system on iOS. Traditional file systems are overly complicated and Apple has rightly hidden them away on the iPhone and iPad so normal human beings don’t have to deal with them... What I am asking for is a repository, just like Photos.app for the ImagePicker. Something that collects files all in one place so they’re easy to find. Just like Passbook for passes and Health for medical and fitness data.
— Rene Ritchie, iMore.com

I completely agree with Rene on this topic and its better late than never that we get a file picker for iOS. And I think the timing is also right as iOS has matured enough and its users are comfortable enough with it, for a file picker. I have for long wanted to replace my Dropbox folder with Apple's iCloud Drive. But unfortunately the biggest use case for me for Dropbox is an online storage drive that replaces the traditional flash drive that I have to carry around. With iCloud drive I was finally hopeful of using an Apple's service instead of a third party one (as if I have to trust one company with my sensitive files/information, it would always be Apple for me) in this regard, but as it stands now, iCloud Drive cannot replace Dropbox for me. So I am hoping for this feature on iOS as soon as possible with fingers crossed!

As of now though Apple's iCloud Drive allows users a file picker option on Mac OS, it is a nonexistent feature on its iOS (Source: Apple.com)

As of now though Apple's iCloud Drive allows users a file picker option on Mac OS, it is a nonexistent feature on its iOS (Source: Apple.com)