Sorry, but thank you for what? First, this is for iPhone and iPad. Second, this is only works to see the calendars on your mobile device which any phone has an app to do this. This does nothing for actually syncing the calendars in their own servers so you can see them anywhere.
My phone shows both my Outlook and Google calendars and whatever other calendar I want in the same app, it's great. But still the Outlook and Google do not sync with each other's server. That means if I do something on my Google calendar, yes, I will see it on my phone together with my Outlook, and vice versa. But I will not see it on my pc's Outlook calendar. And vice versa.
This was not rude, please, but you missed the point completely.