Kindle supports this for many titles. If you have both the book and the audiobook you can read and listen and the app will highlight the words and automatically

Kindle supports this for many titles. If you have both the book and the audiobook you can read and listen and the app will highlight the words and automatically progress the book. You used to have to pay full price for both which made it too expensive for me but they seem to have started offering cheaper upgrades recently. There's some research that shows learning is improved when the information is presented in multimedia form.