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Physical inactivity or low levels of leisure time physical activity is a concern for individuals with SCI as there are clear benefits for exercise in this special population. Exercise must be sustained to benefit health - the effects are quickly lost when people stop being active. There are several behavioral and other approaches that have been tried to help people adhere to exercise programs.1-4 However, many strategies are not sustained by people over time because people lose interest (i.e. people frequently stop using exercise trackers in the absence of other social support), are not widely accessible or are impractical to scale. Mobile health applications can be designed to include effective behavioral change strategies to help people develop the skills they need (e.g., goal setting, self-monitoring) to successfully engage in sustained physical activity. A systematic review on effectiveness of mobile apps among healthy people and in those with a range of chronic conditions found statistically significant improvements in health outcomes.5 A systematic review of the most effective strategies to increase adherence to an exercise program include many features that can be integrated into mobile health applications, such as activity tracking, goal setting and social connections.1,6,7 These evidence-based behavioral change approaches can be delivered in many ways, including in-person contact, use of Internet websites, or using printed materials. Mobile health applications, however, have the advantage of allowing users or moderators to reach others remotely at any time and place locally or globally with easy dissemination of information.6,8 While mobile health technology provides an efficient way to deliver behavioral change interventions, uptake, and long-term adherence to mobile applications and/or wearable devices is often low.9 Applications that enable social connections, such as social media networks like Facebook or Instagram, have the largest engagement of any online applications. According to a recent survey, approximately three-quarters of Facebook users and sixty percent of Instagram users visit these sites at least once a day.10 However, websites and networks focused on people with SCI do not currently integrate a social media approach to support physical activity. Mobile Applications that do integrate physical fitness social networks such as Strava are available but focused on non-disabled athletes and are not adapted to meet the different social, emotional, environmental, or physical needs of people with SCI who want to be physically active or gain support for physical activity specific to SCI.11