Appremix has released an update to its Boxcar Push Notification application for the iPhone platform. Boxcar 3.0 is now a universal app, adding iPad support and a revamped inbox with a pull-down-to-refresh feature, the ability to delete individual notifications and five new notification sounds. Notably, all push notification services offered by Boxcar are now free—previous versions provided one service at no charge and required users to purchase additional notification services via in-app purchase for $1-$2 each. Instead, the new version appears to be ad-supported, with a $5 in-app purchase option for users who would like to upgrade to the ad-free version. Ads are not yet appearing in the application and it is unclear whether or not existing users who have previously purchased additional services will be required to purchase the ad-free upgrade separately. Boxcar 3.0 is available from the App Store as a free download; existing users should receive the new version automatically.