Smartphones can be very useful for mothers. That is why many are beginning to adopt these new devices. According to a study of mothers who have a smartphone made by Mom Central Consulting, 51% of them have downloaded more than 16 applications for their smartphones since March 2011. The main categories of applications are social networking, gaming, entertainment and weather. Other popular categories include music, news, lifestyle and health and fitness. A new study of women in NBCU complements some of the conclusions of Mom Central Consulting. The study done last April, which looked at how women are taking digital tools, indicated that women not only say they feel more…