I installed this from Google Store and whenever I start it, I get the Install screen with buttons at the bottom to Install/Uninstall/Restore.
Maybe I don't understand what is supposed to happen when I start it? Am I supposed to get an interactive shell? Or is Busybox's only purpose so that other apps that need root can call it? FWIW I have Dropbear SSH server that works fine. My phone is rooted. I've gone through the install several times and end up with a message indicating the version I'm about to install is the same as the current version.