The app also includes an easy to follow visual self-check guide and the option to personalise monthly reminders, to ensure that checking becomes a routine.
Colenso BBDO senior copywriter Ellen Fromm said Pre Check reinvents the way we learn about breast cancer.
"By knowing what breast cancer can look and feel like, we're helping women recognise what's normal and abnormal when it comes to their own breasts."
Breast cancer is most treatable when it is found early, so it's vital to know the signs and symptoms of breast cancer as early detection is the best chance of survival.
Breast Cancer Foundation NZ's chief executive, Evangelia Henderson believes the app is a significant new wellbeing tool for women in New Zealand.
"If this new app encourages women to be more alert to breast changes and to see their doctors earlier, it will certainly save lives.
"The information has been available before but this is a new way of putting it in people's hands."
If you notice any changes, see your doctor immediately.