Good luck with the launch! I haven't tried the product but from the description and landing page, I wish we had this when we started building our product. It would make us significantly faster. It allows early-stage products to focus on the product itself without worrying too much about details.
ApparenceKit is a lifesaver for app devs! It packs everything you need - subscriptions, notifications, easy logins, and more. Super easy to use and deploy. A solid five stars from me!