A small number of prototypes of type 1 diabetes smartphoneapplications have been developed and tested in clinical settings[2,17-21]. However, with the plethora of low-cost and free self-management diabetes applications currently available inonline markets (Apple iPhone, Google Android, BlackBerry,and Nokia Symbian), it is pertinent to examine theireffectiveness when integrated in secondary care [16]. Therefore,the aim of this study was to examine the effectiveness of a freelyavailable smartphone application combined with text-messagefeedback to improve glycemic control and other diabetes-relatedoutcomes in adult patients with type 1 diabetes in a two-grouprandomized controlled trial.