Sparrow for iPhone just pushed out version 1.3.3, and the changelog solely includes support for iPhone 5 and Passbook.

There is not much else to report regarding the update, but hit up the App Store now to check out this popular Google-acquired mail client. It costs $2.99, but it has a four-star rating based on over 5,000 reviews:

The company announced the app would get iPhone 5 support in September, but today’s rollout with Passbook support is a neat bonus. It further suggests Sparrow has plans to continue bulking its services for the time being, as it has done for the Sparrow for Mac counterpart, despite the Google buyout.

Let us know in the comments how Sparrow has integrated Passbook. We’re checking it out, too.

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