Org-mode files are synced via Dropbox, iCloud, or WebDAV.
Having a Siri shortcut to just tell Siri to add something to my TODO list would be a nice feature. Glancing at the shortcuts API, there is an append to file feature. I might have to try to roll my own.
I've often wished there was an iOS text editor that understood org format, even just basic markdown style formatting. I'm going to give org-web a go, I think it could be a good compliment to beorg.
Ultimately I decided to build org-web anyway because I wanted something a bit closer to the metal, in a way. My impression of Beorg was that its bit higher level, whereas org-web provides some first class support for org features while still letting you edit the raw text if you'd like to.
To be clear, I think both styles have their advantages. org-web's style isn't better, its better for me.
That said, it’s one of the most used apps on my phone.