Modified mobile apps are not created by the original developers, but rather by third-party coders. These apps can be useful for hacking mobile devices. Hackers can create replicas of popular applications and add free features that are otherwise unavailable to consumers. This way, a person or a group of people can enjoy premium features without spending a dime.
Another great benefit of using mod apps is that they don't require registration. The only difference is that the original app will still have ads, but you'll be able to remove them with a free Mod apk.