ThinkNinja is a free app developed by Healios, designed to educate and support children and young people agedyears old about mental health and emotional wellbeing. It aims to provide a range of skills to help them manage daily life stresses, anxiety, and low mood. The app is accessible for young people referred to Healios by their local NHS Children's Service, and they can log in to ThinkNinja using their Healios account username and password.

Upon opening the app, users are introduced to Wise Ninja, their personal guide throughout their journey of ups and downs with mood. Wise Ninja offers a range of interactive and fun ideas and skills to help users feel healthier and happier. The app also helps track progress and mood and provides useful tips for stressful situations such as exams. ThinkNinja is built on therapy-based techniques called cognitive behavioural therapy (CBT) and motivational interviewing, and also incorporates other techniques for mental health and emotional wellbeing such as mindfulness meditation and relaxation techniques.

Overall, ThinkNinja is a useful app for young people to learn and develop skills to manage their mental health and emotional wellbeing in a fun and interactive way.