Hermit can notify you whenever a site is updated, using Atom or RSS feeds.
First, you’ll need to first locate an Atom or RSS feed for the site you are interested in.
Many sites have a prominent link on their home page, or have a separate page labeled “RSS” or “Feeds” that contains the addresses of many different feeds.
One way to locate a Feed URL for a site is to conduct a Google search for the site name followed by “rss”. E.g. reddit rss, or instagram rss. By following instructions on those pages, you’ll be able to obtain a URL that points to an RSS feed. E.g. the Twitter RSS search takes you to TwitRSS.com, which offers a link like this for user @hermitapp: https://twitrss.me/twitter_user_to_rss/?user=hermitapp. Copy that URL to use in Hermit.
Another way is to install the RSS Subscription Chrome extension on your computer. It will automatically detect feeds on any site that you are on, and gives you a way to copy the actual URL. Tap on the new orange feed button in your Chrome toolbar to get started.
Copy that Feed URL to use in Hermit.
On the screen that comes up,
Hermit offers a unique feature in customizing every notification, including the vibrate pattern — use dots and dashes, like in Morse code, to create a unique pattern of short and long vibrations. Pick any ringtone from your phone, and select one from lots of icons provided.