The financial burden of poor medication adherence in the United States has been estimated to be between $100 and $289 billion per year. Mango Health's solution is to improve medication adherence using gamification. Its app allows users to earn points for completing tasks, such as taking their medication on time. These points translate into various rewards provided by Mango Health's partners.
The app includes other features that support medication adherence: a health journal, refill reminders, information about medications, and alerts about potentially harmful interactions.
Based on what I've read, I really like the app because the game aspect is really simple, and the additional tools address core issues related to medication non-compliance.