Both are awesome tools, but for variables, I always Data Jar. Unfortunately, at the moment, Data Jar is broken in i*OS 14 (public beta). @simonbs has created a workaround in a TestFlight beta, but that is also having issues. Here is a Tweet from datajarapp a couple of days ago.
I really hope it gets fixed by Apple as it is such a useful app and I have a lot of Shortcuts that use it.
Ugh. I was trying it and attempted to write to variables keep timing out (but the writing happens anyway). I’m using the TestFlight version, but on iOS 13
@tf2 A new beta for Data Jar has just been released and it seems to be back up and running now. Thanks @simonbs. Awesome app and great customer support.