The size of the iOS app can vary based on your device, as the App Store dynamically adjusts the app download to match your device. In addition, the disk space used by the app can also vary based on the feeds you’re subscribed to. Typically the size of the iOS app once installed and configured is 80–95MB.
The size of the Android app is significantly smaller than the iOS app, due to a simpler protection mechanism. This means savings can also be made by not needing to include instructional videos showing the user how to enable the app. Typically the size of the Android app is between 2–6MB.