Grandad: I was intrigued by your question. So, off to Google I went. I found this app:
BugMe!
It's an app that will create little icons on your home screen (if you wish). Or, you can leave the notes within the app. The cool thing is you can write on the note with your finger, making it a quick note taker. You can also set an alarm to have BugMe! send you a push notice. Very cool.
It uses Safari to create the note on your homescreen. It does a lot of things, actually. There is a BugMe! Lite which is free (but only lets you have 3 notes at a time) and the full function app is $1.99 USD.
I actually liked it so much that I purchased the full featured one. Just what I need, another app store purchase.
Hope this is what you are thinking of. Good luck.
Marilyn
P.S. I am assuming you can get it in the UK - because my first Google search said the app wasn't available in the USA ... but it was. Plus, the app description in the app store talks about how wonderfully people in Australia and Europe like it. So, apologies if you can't get it...