Changing handwriting into text

I have a hand injury and it makes typing really difficult. But holding a pen is ok. So I remembered seeing a few years ago a software which converts handwriting into text. I went back to that shop but they could not help.

Which is the best software, tablet and stylus or computer to buy? What is important? I have an old laptop running win 8. I have a Kindle HD and an IPad. But if it means upgrading eyc thats not an issue. I just need to be able to write and convert to text. I use Open Office.

Please help. I don’t know where to start looking.

Thank you

Daniela