I've been waiting quite a while for the audio to "show up," but still no go. I agree that it's pretty much guesswork until we can hear it. I'll keep checking in regularly and trying it withosut now and then.
If you arent going to add audio, this language needs removed. Navajo sounds are nowhere near english sounds. Without audio, it becomes necessary to find another app/site to learn navajo. And that is exactly what ill do if audio is not added.