Have a look at OmniOutliner!
I think that the Essentials version is already better than Cloud Outliner Pro.
And the Pro version also supports images!
You can test both for 14 days.
Which Notes app do you use?
I am split between Notes, Notability, ZoomNotes and Notes Plus, but tested many more.
About mail … how do you handle that with Drafts?
Most of the time, I am replying to an existing thread, so just sending a mail from Drafts does not work. I would first need to copy what is visible in the mail after hitting „Reply“ to get the quotes and everything, then paste in Drafts, write my stuff and then copy and paste this back into Mail.
Just selecting the text in mail and sharing to Drafts does also not work, as Drafts seems to remove the quotation signs. Strange.
So, Drafts is no solution for me for email.
Or are there any tricks and workarounds that help in this?