The latest update of Brave Frontier was released on Oct 18, 2020 and the app has been installed by over 10M users. Some in-app purchases and advertisements are included into the game. This application is often downloaded by Samsung and Lenovo users.
You are able to download the .apk setup package of Brave Frontier 188.8.131.52 for free and read users' reviews on Droid Informer. This file size doesn't exceed 43 MB and the app can be launched flawlessly on Android 4.1 and higher.
As users indicate, the obvious drawback of the app is login issues.