Story behind the app
BusyBox for Android was first published in March of 2011. It was the second BusyBox installer on Google Play. It was developed due to unsatisfaction with any current solutions.
The app was re-written in February of 2016 to give users a better BusyBox installer alternative. The app closely follows material design guidelines. You can find the source code on GitHub.
The app is published by JRummy Apps Inc. — a trusted company with over 30 million installs from several root related apps on Google Play.