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The Entourage star–seen here hanging out with his fellow HBO castmates–is currently working on helping design an iPhone app to steer people toward eco-friendly products while they’re online shopping.

Of course, Adrian Grenier’s not actually designing the program himself, as much as he’s providing insight to the people doing the actual coding.  The project is entitled Ecohero and will help provide tips on when a product is actually environmentally responsible.

So yeah, in case you were wondering, there will now be an app for that.

Gallery Info: Adrian Grenier and the boys of Entourage hit the streets of Los Angeles.