Earlier today Instagram beat out Draw Something and Angry Birds Space to claim the top spot in the App Store for the first time ever.

The service’s popularity reached new heights following the stunning $1 billion acquisition made by social networking giant Facebook.

Instagram, available from the iOS App Store as a free download, looks add to a user base of more than 30 million while in the pole position.

Thousands of subscribers took to Twitter to express fears that Facebook may introduce unwanted advertising. to the service or remove photographs that violate the terms of its user agreement.

Instagram made its debut in the Google Play Store earlier this month, attracting more than one million downloads on day one. The service first launched in October 2010.