I know about them. But I would have to root my phone to install them. And that means trusting some binary blob from someone on the internet. So I would not do it.
On iOS maybe, but there's no problem installing 3rd party app stores on Android without rooting. See for example F-Droid.
Recent versions of Android have also improved the permissions model... you can specify what apps (e.g. F-Droid) are allowed to install other apps. You don't need to add a blanket allow forever.
Recent versions of Android have also improved the permissions model... you can specify what apps (e.g. F-Droid) are allowed to install other apps. You don't need to add a blanket allow forever.