This page will be the checkout. It is not one today.
Holos is finished enough to use every day — it is what wrote most of this site — but it is not finished enough to charge for. Taking your money before the download and the licensing are properly in place would be the wrong order to do this in.
If you want to know when it opens, write to support@holosvoice.com and you will be told once, when it is. Your address will not be used for anything else, and there is no list to unsubscribe from.
In the meantime, the description of what it does is accurate, and so are the privacy policy, the terms and the refund policy — they were written against the code rather than from a template.