The researchers found that the app had a typical-use failure rate of 5 percent and a perfect-use failure rate of 1 percent, which makes Dot comparable to family planning methods such as the pill, vaginal ring, and other fertility awareness-based methods. "More and more women are using apps as a family planning method, so having an option backed by strong evidence of effectiveness is critical," says Victoria Jennings, PhD, principal investigator of the Dot effectiveness study and director of the IRH. "Women must be able to base their app choice on solid evidence about how well the method works and what's involved in using it. That's why it was so important that an app like Dot undergo a rigorous effectiveness trial conducted according to established study guidelines used to study other methods." - www.sciencedaily.com