Happy to spread the word about ActionsApp [and I’m in no way affiliated with them!] – I’ve been using it for more than a year now, and it’s one of the most often used apps on my iPad.
Must be honest, it made me a bit lazy initially – since it became a visual & tactile representation of all my Mac shortcuts [each ‘set’ is tied in with whatever App on the Mac has focus – so when you swipe out of DTPO, into say Safari, the ‘set’ in Actions on the iPad changes as well, so you always have your shortcuts etc. with you] – which meant I had no real need to “learn/remember” anything… 
But when they rolled out the IAP “Flows” upgrade - it took on a new life. It’s basically like KM, only a visual one, on the iPad. Obviously not quite as sophisticated, but I’ve surprised myself on several occasions with the workflows I was able to construct, across multiple Apps!
And when you add in the stock-standard ability to insert text snippets/control shortcuts/control media/system controls/window controls/webpage access/email templates - it’s a lot of bang for your buck, so to speak!
So figured the above could give someone inspiration – KM and ActionsApp – annotation bliss! 