The National Lottery’s official Android app can’t be downloaded from the official Google Play store. The official app store doesn’t allow gambling and lottery apps that offer real cash prizes. Instead, in order to play the Lotto on your Android you need to make a change to your smartphones settings allowing apps to be installed from unknown sources. The app does not warn users about the dangers of enabling side loading apps, the most common attack vector on Android. Is that a gamble you want to take?”]
Source: https://grahamcluley.com/national-lottery-fails-set-good-security-example-android-users/