Just an update to say that i tried to update the CC app with a few new files and it crashed wiping the app completely. I can't do anything to prevent that.
I had over 4900 TXT files in the app, I wanted to add four more and it started to sync with calibre and after a few minutes it crashed and wiped the app clean
Looks like everytime I want to update the app i'll need to uninstall it and load all the files again which too time consuming unless i'm going away and won't have my laptop with me (like holidays).
Hopefully one day the IOS app will be as stable as the android one, until then i'll just use the android app.