I currently use only Android and I'm considering some IOS devices. One thing that's given me pause is file management. I use ES file Explorer on Android, is there anything comparable on IOS? Because even on android I've been unable to find a satisfactory alternative.
With ES I can connect to multiple SMB shares, and multiple cloud services (including multiple accounts from each service) and copy files directly from and to the phone. I couldn't make do without this functionality.
But there's also the way it handles media: A lot of android file explorers I've tried allow me to play (stream) one file at a time directly from cloud/SMB directories, but that's it. ES lets me play a folder, or select multiple files and play them (and even select yet more files and "add to playing" on the fly). I use this functionality every single day. The same applies to images; I can slideshow through an SMB folder of images without having to download them or anything.
ES has many bugs, but try as I might, I haven't been able to find anything that can truly replace it on Android.