Kingdom Rush has been downloaded and installed by over 10M users and its most recent release is dated Jan 29, 2018. Take into account advertisements and in-app purchases while launching the game. The statistics demonstrate that this application is popular mostly among Samsung and Lenovo users.
You can get the .apk setup package of Kingdom Rush 2.6.5 free of charge and take a look at users' reviews on Droid Informer. This file size doesn't exceed 28 MB and the app can be launched flawlessly on Android 4.0 and above.
From the users' point of view, the strong side of the app is an amazing design. According to the users’ reviews, the main drawbacks of this application are ads while playing, a battery drain and its high cost.