TechCruncha4s��Disrupt finalist CheckPoints is a mobile shopping rewards app that lets consumers choose their own rewards. Despite not being available for OS3 users until recently, CheckPoints is currently the fastest growing mobile shopping application (in the same space as Shopkick and Barcode Hero) on the iPhone, amassing its first 100K users in one month and its last 100K users in the past two weeks.

The app is free to download and use, and lets shoppers earn CheckPoints by checking into over a million participating locations and scanning the barcodes of a number of featured products including Belkin, Tyson, Energizer, Kmart and more. You can redeem CheckPoints for prizes like cash, gift cards, airline miles and gadgets.

The app aims for a notably different demographic than Foursquare and Checkpoints users, who check in on average about 3 times a day, are predominantly female and 64% of them are between the ages of 25 and 44.

The decision to go Android wasn&'t very hard,&''From the moment we debuted in the Apple App Store, we�a4���a4�ve had requests to expand to the Android Market �a4���a4� in fact, we�a4���a4�ve got a waiting list of over 10,000 people,�a4���� said co-founder Todd DiPaola.

Venice-based CheckPoints currently has 1 million in funding. You can find the app in the Android Marketplace here.