Google used to do very little curation of the Play Store (or Android Market, if you go back far enough), but it has long sought to improve the platform's reputation as being less secure than the Apple App Store.

Google is slowly rolling out new restrictions on sideloading for Android. Eventually, developers will have to verify their identities with Google, or be blocked from distributing apps.

Google wants to make sideloading safer on Android by verifiying the identities of developers who distribute apps outside the Play Store.