Use Notes on your iPhone, iPad, and iPod touch - Apple Support

iPod touch now removed from Apple website - 9to5Mac

Create to-do lists - Apple Support

Set up your iPhone or iPad - Apple Support

If you're missing notes on your iPhone, iPad, or iPod touch - Apple Support

Listen to audiobooks in Books on iPod touch - Apple Support

iPod touch User Guide - Apple Support

Draw in apps with Markup on iPod touch - Apple Support

Create and format notes on iPad - Apple Support

Mark a device as lost in Find My on iPhone - Apple Support

Why does my iPhone notes app take up 500mb for less notes than Google keep has in it at roughly 100mb of storage? - Quora