KARA and Rainbow have teamed up with Naver Japan to bring a new smartphone application to their fans. On December 14th, the portal site released a new app specifically designed to help fans keep tabs on their two favorite girl groups. The app can be used on any Japanese language-based smartphone. Users will be updated on member profiles, new teasers and MV releases, as well as the latest information regarding KARA and Rainbow. Fans will also be able to listen and purchase all the songs the girls released in Japan via this one application. Happily for fans, the app is free and available to download immediately. In related news, the ladies of KARA will be attending the 62nd annual 'NHK Red & White Song Festival' (Kohaku Uta Gassen) towards the end of the month. Rainbow, having been dubbed as the 'sisters of KARA', has made a rather successful breakthrough in Japan.