You do not need to install this unless another app requests it. That may direct you towards Google Play, but you can install this instead. There are currently no such apps in this repo because they require a different SDK to build. For testing purposes, there is a Breakout-style game apk available via <a href="https://f-droid.org/forums/topic/xbreakout">this</a> thread. Ministro is a system wide Qt shared libraries installer/provider service. It acts as a bridge between your apps and Qt libraries. The connection API protocol used by applications to connect and query the service is released under BSD license, it mean that any application (no matter if that application is free or not) can connect and query its services. Also, be aware, this service will install/provide the free versions of Qt libraries, licensed under LGPL v2.1/ GPL v3.