Under the newly listed code changes, Google will take stricter action when installing outdated apps on new devices. Starting with version 14, Android doesn’t even allow sideloading of apps targeting older versions of the OS.
As of now, Google does not allow newly listed apps on Google Play to run on Android versions earlier than 07 as target, but still allow users to sideload legacy software. Also, Google Play will still allow you to install older apps that you have installed in the past.
As we’ve already pointed out, Android will change everything . Sideloading applications requires above-average technical skills, using a command shell and a new flag to allow installation. This way, users cannot accidentally install unsafe apps on their phones.