There are many reasons why to write your algorithm in assembler. You can have all the optimizations firmly in hand. However, it comes at costs – you need to know a lot about the hardware running your program, your program will be highly non-portable, non readable and you will spend ages on writing it. Oh, did I mention that debugging is a hell? Preparation So, to start using assembly in Android Studio, you need to install Android NDK. You can install it manually (and reference the installation) or from the Android Studio itself ( File > Settings > Appearence & Behaviour...