They are almost always outdated, dangerous, and unsupported.
Do yourself a favor. Delete the search for "No License." Install the official Base app. If you love Quake, buy the license. It costs less than a pizza slice and ensures that you can play Quake 3 Arena on your phone for years to come.
You only pay to unlock the ability to load your own .pak files. You can play the demo indefinitely for free.