Featurekit

Creator here. Please, let me know if you have any questions. Thanks!

Loved it. Any plans to give the service as a self-hosted solution? Also any plans to make it a general purpose, onboarding solution like inlinemanual.com? (no connections with them, just giving it as an example here).

Add one line of Javascript to your app, automatically track user visits and notify users when new features are added.

Looks interesting. I've seen sites use Intercom to announce new features, but could be an area for a dedicated, more focused product. A bit of feedback: HTTPS that login (and the app if it's not).