HN Notifier is a Chrome extension developed by Engagespot. It falls under the category of Browsers and is specifically listed as an Add-ons & Tools subcategory. This free extension notifies users via an in-app bell and email when they receive a new reply on HackerNews.

With HN Notifier, users can stay updated and never miss an important reply on HackerNews. The extension delivers notifications through both the in-app notification center and email. This ensures that users are promptly informed about any new replies they receive.

One notable feature of HN Notifier is its privacy policy. The extension does not collect any private data such as cookies or sessions. This provides users with peace of mind, knowing that their personal information is not being compromised.

Overall, HN Notifier is a useful Chrome extension for HackerNews users who want to stay informed about new replies. It offers convenient notification options and prioritizes user privacy.