Tips Stop the Play Store from downloading 50mb+ apps?

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http://androidforums.com – Hi, Quite ironic that one of my main gripes on (non jailbroken) iOS was the download limit, since I had an unlimited plan, but with my S3 I only get 1.5GB and I'm eating through it. For example just now I purchased the Batman game through the play store online, then noticed my phone was part the way through downloading it... and it's 1.7GB! Is there anyway to stop it from downloading things like this? Even stopping automatic downloading of all apps (though it's handy) until I get onto WiFi like the updates would be good. Thanks :) (General)