It would have to be approved; there is no way for lay-users to install/configure TM-SGNL in their own; it needs to be deployed via MDM.
Source: I'm the admin who installs TM-SGNL for many users.
Source: I'm the admin who installs TM-SGNL for many users.
So... is it properly open source?
His repo, not theirs: https://github.com/micahflee/TM-SGNL-Android/commits/master/
He points out that "You must license the entire work, as a whole, under this License to anyone who comes into possession of a copy."