Calender app?

[schrotzy]

I am wondering if anyone out there could recommend an app that enables Google Calender, an Iphone(VZ), and a RZR to sync. So far with my RZR, I haven't had much trouble, but now that my wife has an Iphone 4, she says that stuff that I post with my phone doesn't show up on hers. It shows on my phone and online, but not on her phone.

Anyone else run into this problem?

Thanks!!