As mentioned by Stevil in this post, Calm is an amazing app. I love the sleep stories too. Only instead of the previous deal of $300, this one is free.
While I know making a quality app costs money, I agree with the commenters on the previous post saying the price is prohibitive and potentially keeps it out of the hands of those that need it most, while ironically causing some anxiety.
I recommend the app to a lot of my clients and they love it. So, the deal. If you're a teacher, school counsellor, psychologist, etc or know anyone who is, or, can pretend to be, fill out the form and get a premium lifetime membership to both Calm and Calm Kids.
I filled out the form with my non-work email address and it was approved in about 24 hours.
Get on it team :)
Luckily I've retained the ability to tell my kids bed time stories without recourse to an app.