The Iowa “Sounds of Speech” website contains animated libraries of the phonetic sounds of English and other languages. App versions for Android & iOS are also available under the name Sounds of Speech. 
On both the website and in the app, for each English consonant and vowel, you’ll find an animated articulatory diagram, a step-by-step description, and video-audio of the sound spoken in context. The animated side view of the mouth is particularly helpful for tongue placement and to see the difference between nasal and non-nasal sounds, e.g. /l/ and /n/.
If you’re not familiar with the categories on top, click on “voice,” because then you’ll have just two sets of consonant sounds to look at. “Manner” just means how the mouth obstructs the flow of air, and “place” just means where in the mouth that obstruction occurs. Vowels are listed separately: “monophthongs” is a fancy word for simple vowels with one sound (sometimes finishing in a glide), and “diphthongs” is another fancy word for combination vowels like /au/ in “house.”
This project was a collaborative effort of the Department of Spanish and Portuguese, Speech Pathology and Audiology, and Academic Technologies at The University of Iowa.
Here are past comments from users:
–Fantastic tool because it shows you not only the sound difference but also the mouth and tongue and teeth positioning. Very vivid. Love it.
–Interesting…if you are able to control you tongue though!
–Good. I can know exactly where the tongue should be located
I would love to see this for french too!
Mais oui, moi aussi!
How do you get to this website?
Hi, thanks for pointing out that the link has changed! I’ve updated the description above with the new link. To get to the website version (as opposed to buying their phone app), scroll down the page. The full link is http://soundsofspeech.uiowa.edu/index.html#english
I planning my Esl classes in Lynn, Mass. and i wanted to include your site as regular resource for my students. I am disappointed, however, that you folks are charging for the app. If that is true, do you have an educator’s deal?
I love your site and love that it is academic.
Hi, Ms. Kiley. The University of Iowa offers the website for free, actually, even though they charge for the app. I like the full functionality on the website, and haven’t yet found additional features (except mobile convenience) in the app. This e-resources site is not affiliated with the University of Iowa. We’re at the University of Michigan.