iPhoto and Photo app on iOS device.

Hello fellow Apple users,

I recently downloaded the iPhoto application on my iPad.

I like the way I can edit my photo's right from my iPad but however, I got an issue.

When I edit a picture on my iPhoto application it doesn't change in my photo app that is standard in iOS.
So lets say I want to rotate this one picture and and add a little effect, it is changed in the iPhoto app, but not in the main photo app.

Does anyone know why this is and how I can change this?

I tought about it myself and maybe it's because i don't have the latest version of iPhoto on my iMac yet.
Could this be the problem?

Thanks in advance,
Pieter