I have a iPhone 4s my wife has a Samsung galaxy, the problem we have with a busy schedule is that she has a diary and I have mine, so what I'm looking for is an app where I can enter in a diary and she can see it and visa versa so she can put something in and I can see it! Is there an app ?

If you use a shared Google diary then the iPhone and Galaxy should be able to see those.

Me and my wife use a shared google calendar (i set up just for the purpose, so we dont use the email), that both our iphones use. Then we have our own personal email accounts.

Using this technique i also download the calendar as a scheduled task on my pc to backup.

Google calendar for both.....Use the Calengoo app, available for both android and IOS. Calendar updates from all sources instantly......

Ok set up a google calendar account on my iPhone and have the app calenmob which is easy to use so can my other half download the app on her Samsung galaxy ?

Any calendar app she chooses should work as long as its compatible with google mail.

Can anyone recommend a good free android app from android a easy to use one as she's not the sharpest

you don't need an android app for google calendar. Just add the shared account to the phone and it will show up in the calendar. (or, a neater solution would be to share the shared calendar with your individual accounts; the phones then pick them up anyway)

Now I'm not the sharpest, I have added the icon to her home screen is that it ?