Groupon Reserve launched at the start of July, allowing desktop users the ability to book tables at discounts of up to 40 per cent, and now the feature has rolled out to Groupon for iPhone.

Announced on Tuesday, version 2.7 of Groupon for iPhone now offers the new Reserve tab. The update, which is optimised for iPhone 5, also includes the ability to add more images for Goods products, and it brings an improved checkout flow for new users.

Groupon Reserve is available online and through the iPhone app in a number of cities, such as Atlanta, Boston, Chicago, Denver, Los Angeles, Miami, New York City, Philadelphia, San Francisco and Washington, DC.

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We already tested Groupon Reserve out in Manhattan, scoring 40 per cent off at a 5-star French restaurant on a Saturday evening. It's definitely worth trying; it's very similar to the site Savored, which allows users to find and select restaurants "at an amazing price".