I used to use the audio feature on my iPhone Notes app quite often, though it sometimes doesn't "hear" you correctly so you've got to monitor it constantly.
Also, Google Drive for laptops/tablets has an application option for creating docs with voice. You first have to insure you've downloaded Google Chrome to your hard drive, then from the home page select Google Drive application, and then open a new document. From there you goto the menu bar and select "Tools" and from the drop down menu select "Voice Typing".
When my father lost his functional vision we found software Dragon (Nuance Dragon) that is specifically designed for speech recognition. He was monumentally technology-challenged so it never worked out, but it's worth a look.
Here is a youtube video of Nuance Dragon software.
x
x