It's the first of May, and you all know what that means: free access to the MLB At Bat app for T-Mobile subscribers starts today! Tmo's multi-year contract with Major League Baseball gives its customers free access to the video and audio streaming app. Normally the app and the service are part of the expensive MLB.tv game streaming package, or a separate purchase of $3 a month or $20 a year.

There are some surprisingly strict terms. Naturally you'll need an active T-Mobile account to qualify, and you have to download the MLB At Bat app between now and June 30th. Do that, and you'll get a year of access to the mobile service. If you've got a WiFi tablet, be sure to download the app on your T-Mobile Android phone first, so you can set up a MLB.com account or log into an existing one and get credit. After that, you'll get access for the full 2013 season on whatever Android (or iOS) device you're using.

As a quick refresher, MLB At Bat includes live video game-style updates for all Major League Baseball games, access to the official radio coverage of all live games, and live video streaming of the MLB Game Of The Week Day (though the dreaded blackouts may apply to your particular market). Free users get a general news section and nationwide scoreboard, and the app doesn't look half bad for all of that.

Have a scone and a large house blend with your baseball: MLB At Bat is compatible with Android devices running 2.2 or later.

Offer terms via TmoNews - Thanks, @WinDroidGuy and @mtlucarell!