App size can be measured in different stages, and each stage contributes to a different part of the user experience. You'll likely come across a few different measurements of app size, so it's a good idea to know what they mean.

iOS

Emerge’s iOS app size metric is roughly equivalent to the unencrypted install size of your app on the latest iPhone hardware running the latest iOS version. Since this is what users see before downloading your app and before deciding if an app should be deleted, we think it’s the most important metric to track and reduce on iOS.

For full details on app size on iOS, see iOS app size.

Android

Emerge's Android app size metric is roughly equivalent to the compressed download size of your app on a Pixel 5 running Android 11 with English as the primary language. Since download size is what users will see before downloading your app on Google Play, we think it’s the most important metric to track and reduce on Android.

For full details on app size on Android, see Android app size.