TetherAll is a free iPhone app developed by TryCycle Data Systems Inc., falling under the Lifestyle category with a focus on Health & Fitness. Exclusively for patient use, TetherAll is tailored for individuals in treatment or awaiting treatment for substance use or mental health disorders. The app facilitates real-time digital check-ins, enabling patients to stay connected with their healthcare team between appointments. Through self-reported assessments of mood, feelings, and symptoms, TetherAll aims to raise awareness and accountability regarding daily behavioral patterns and risk factors.

Patients receive notification prompts to complete confidential check-ins, with the option to attach diary entries to each submission. Moreover, users can earn badges and rewards for completing various tasks or time-based events, fostering engagement in treatment. It's important to note that TetherAll is a supplementary tool and should not replace existing treatment or in-person interactions with clinicians.