The All New DEVONthink To Go for iOS
www.macdrifter.com/2016/09/the-all-new-devonthink-to-go-for-ios.html
What Jamie wrote
DEVONthink for iOS is a full featured, secure document manager with terrific capture tools and a really powerful PDF editing option. It supports simultaneous sync with several different services and adds encryption on top. I like it better than Evernote, Apple Notes, or OneNote. It costs $15. Buy the IAP to get better sync and PDF editing. It's changed how I use my mobile devices.