I put this together last week using the HN Algolia API. 492 users and 1571 notifications sent so far.
Just found your HN post (via Google) and signed up. Thanks for building!
For those who wish it had RSS, Slack notification, etc. — just encourage them to hook it up to Zapier. You can create an email receiver that triggers tons of other actions, and you can chain them together. hook.io is a free, 100% code alternative.
I'm Dan Grossman, the sole developer behind Improvely and
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Past work & open source —