https://techcrunch.com/2018/10/18/google-improves-android-app-bundles-and-makes-building-instant-apps-easier/

Google is launching a number of new features for Android app developers today that will make it easier for them to build smaller apps that download faster and to release instant apps that allow potential users to trial a new app without having to install it.

Android App Bundles, a feature that allows developers to modularize their apps and deliver features on demand, aren’t a new feature. The company announced these a while ago and there are now “thousands of app bundles” in production and that the average file size reduction is 35 percent. With today’s update, Google is making some changes to how app bundles handle uncompressed native libraries that are already on a device. Those will lead to downloads that are on average 8 percent smaller than before and take up 16 percent less space on a device.