Apps are probably one of the biggest uses of space on your device, and they might be slimming down in the future. Google is preparing to offer developers an automatic APK optimization service. The idea is to deliver smaller APKs to users that have all the extraneous bits stripped out.
Google has been doing something similar internally for years, which is why there are often so many different builds for each app.
Google will soon offer automatic APK size optimization to developers was written by the awesome team at Android Police.