Sway Medical represents a significant advancement in mobile health technology, offering FDA-cleared objective assessment capabilities through standard iOS devices. The application leverages built-in motion sensors to quantify balance, stability, and reaction time, providing healthcare professionals with clinical-grade data previously requiring specialized equipment. This positions the app uniquely in the digital health market as one of few mobile solutions with legitimate medical clearance for concussion and fall risk assessment. The core functionality revolves around three primary assessment protocols: balance testing using device motion tracking, reaction time measurement through visual stimulus response, and cognitive load assessment during dual-task activities. Each test generates quantifiable metrics including sway velocity, reaction latency, and stability scores, which are stored in secure patient profiles for longitudinal tracking. The system requires calibration specific to each user's baseline, enabling accurate comparison across testing sessions for monitoring recovery progress or medication impacts. User experience reflects its clinical purpose with a utilitarian interface prioritizing data accuracy over aesthetic appeal. The testing process involves precise positioning instructions and requires controlled environmental conditions to ensure valid results. Healthcare professionals typically administer tests in clinical settings, though the portability enables sideline assessments in athletic environments. The account-restricted access model ensures only qualified practitioners can interpret results, maintaining appropriate medical oversight despite the consumer-grade hardware platform. User feedback reveals polarized perspectives reflecting the app's specialized nature. Positive reviews from medical professionals like emmc704 (August 27, 2024) highlight its value for establishing athlete baselines, while that material gurl (August 15, 2024) defends its medical purpose against users criticizing its non-game-like experience. However, the inclusion of irrelevant five-star reviews such as auo hdk's August 1, 2025 donut commentary suggests potential rating inflation concerns alongside legitimate praise for clinical utility. The application demonstrates strongest utility in sports medicine contexts and neurological rehabilitation settings where objective balance metrics are valuable. Limitations include dependency on proper administration technique, inability to replace comprehensive clinical assessment, and restricted access limiting direct patient use. When deployed by trained professionals within appropriate clinical protocols, Sway Medical provides valuable quantitative data enhancing traditional assessment methods with objective mobility metrics.