Half of mobile device owners spend $100 or more on a purchase via their smartphone, according to a new study by JiWire.

City-centric social application Whatser launched in November, but the company just released a new version of its app with updated features that allow users to better explore their favorite local spots and share them with friends.

Money Mailer Direct Marketing and Coupons Inc.’s Coupons.com have expanded their partnership to include mobile coupons.

Papa John’s and Starbucks are advertising on GeoVector Corp.’s World Surfer application on the iPhone and Android platforms.

Consumers using Research In Motion’s BlackBerry smartphones can now download Slifter, a free ad-supported location-based mobile shopping tool.