The new mode has been available for iOS users since March.
However, those signed up for the Android alpha program have been able to choose between 'dim' and 'lights out'.
It comes after the micro-blogging site reportedly carried out tests for a 'Snooze' button which enables the silencing of push notifications.
According to top tech blogger Jane Manchun Wong, the app started trialling the new update on some accounts last month.
Wong explained that it works by shutting down notifications for three set times of one hour, three hours and 12 hours, ideal for those who want to take a small break from social media.
The app has only just launched it's "shiny" new desktop site.
As well as a new "updated look and feel" and the introduction of dark mode, Twitter also has a Bookmarks feature and they've moved Trends to the right hand side of the page.
You can also change the display colours around and an Explore feature has been added which has videos and local content defined by the user's location.
They said: "We are starting to roll out a new Twitter.com - a refreshed and updated website that is faster, easier to navigate and more personalised.
"The site has an updated look and feel that is more consistent with the Twitter you see on other devices."
One feature which still hasn't been implement by Twitter, but which many people have called for is an edit button.