Implementation of a Just-In-Time Adaptive Intervention for Adolescent Anxiety

The goal of this clinical trial is to evaluate a smartphone based just-in-time adaptive intervention (JITAI) tool to deliver somatic behavioral recommendations for anxiety management among youth. The main questions it aims to answer are: * Is the JITAI tool acceptable among the adolescent study population? * Is the JITAI tool feasible to deliver to the adolescent study population? * Does the study support preliminary efficacy of the JITAI tool among the adolescent study population? The tool will be pilot-tested among a sample of 50 rural adolescents experiencing elevated anxiety levels who will be randomly assigned to the JITAI tool or a waitlist control, for a treatment period of 3 months. Participants will be asked to: * Use the smartphone based JITAI tool which will deliver somatic behavioral recommendations intended to manage anxiety levels for a treatment period of 3 months * Respond to the tool's prompts on a daily basis and follow the delivered behavioral recommendations * Complete anxiety and interoception assessments at study start, study end (3 months), and one-month follow-up * Complete usability and user experience instruments at study end (3 months)