The most recent update of Black Glass theme for Next Launcher was released on Jan 18, 2017 and the app was downloaded by over 100K users. Advertisements are a part of this application. Samsung and Meizu users like the app.
A free .apk installation package of Black Glass theme for Next Launcher 3.0.0 can be downloaded from Droid Informer and you can read users' reviews on this site. Prepare 12 MB of free space on your device for this app setup package and take into account that it requires Android 3.0 and higher.