Expo SDK 41

The size for an app built with expo build on iOS is approximately 20mb (download), and Android is about 15mb. This is because a bunch of APIs are included regardless of whether or not you are using them — this lets you publish updates that use new APIs, but comes at the cost of binary size.

One of the simple ways to make your APK smaller is to reduce the number and size of the resources it contains. In particular, you can remove resources that your app no longer uses, and you can use scalable Drawable objects in place of image files.

Below are the 8 best ways to reduce android app size: