Hi there, you could try NotePad+ it has many fonts which can be made larger or smaller. You can also change the font color. It does cost $1.99 US and I don't see a free trial period. It appears that you need an AirPrint printer to print the text. They claim that you can email the text, but when I tried the text reverted to the standard font. You can save the text as a PDF I suppose and email that.
Sent using my iPad 2 - 16Gb - Wi-Fi only