DEVONthink To Go 3.0
www.devontechnologies.com/blog/20210210-devonthink-to-go-3
What Jamie wrote
DEVONthink has now upgraded the iOS app to the same level as the macOS version. I use DEVONthink for projects that have a high volume of documents, benefit from annotation, and powerful searching. It is often paired, using easy URLs, to projects in OmniFocus. The updates here are great and was easily worth the upgrade price for me. Adding CloudKit sync for iOS and 3.6.2 for macOS is also a big improvement. Also see MacSparky comments on the new version.