BB Z10 Need urgently VIABLE calendar app that syncs with BOTH Gmail & Hotmail

The inbuilt calendar app on the Z10 syncs with both Gmail & Hotmail, as such when I go into Setting/ Accounts...
I have the server details for both Gmail & Hotmail so I can add to calendar to either the app or mainframe and everything syncs

The problem is I can't find any calendar apps in either Blackberry World or Amazon
need more from calendar than "basic"

The apps are in the most standalone so phone only so won't display anything held in Gmail / Hotmail ( then you have to uninstall them)

A few others say they sync but when you enter the server details of the inbuilt app nothing works (e.g BC2 Business Calendar 2)

In short if you are personally using a calendar app which syncs i.e works then that is all I am asking for the name of the WORKING calendar app, so that I know it is, or should work

My current version is 10.3.2.8.2836 in late may I finally got the 10.3.3 update advice but as there were reported problems I cancelled the download

thanks