Despite pregnancy being a precious window of opportunity to bring about lasting beneficial for patients and their offspring, and smartphone-based resources being the preferred source of information by women with GDM, there are very few smartphone apps that are designed specifically to support self-management of GDM. Moreover, there is a need for such apps to be customized to the local context in terms of language, nutritional habits and food sources; and integrated to a reliable degree with existing healthcare services, clinical workflow and setup. To the investigators' knowledge, there are no such apps that fulfil these characteristics and features that are currently available in Singapore and in this region, and globally there are only two other similar trials among the GDM population which is being carried out - one in Norway and another in Ireland.