Google just can’t seem to make friends with Windows Phone. The latest crackdown will come in May 2014 when the search giant begins to enforce its terms-of-service for its Google Voice service, barring third-party companies from making apps.

Google Voice, which used to be Grand Central before it was bought, is a one-number-service that allows users to have a single phone number to ring all of their phones—landline or cellular. It also allows users to protect their real number by giving out their Google Voice digits instead as well as send “free” text messages, since the service utilizes data.

Up until recently, third party developers could tap into the service, releasing their own apps. On Android or iOS, the demand for such solutions is quite low due to both platforms having official options for users. However, since Google shuns everything that is Windows Phone, there is no official Google Voice app for Microsoft’s OS. As a result, developers have created solutions, including the top-rated MetroTalk app to fill in the gap.