The Blood Oxygen App by AboutMe Apps, Inc. represents a specialized health monitoring solution for iOS users seeking to track vital signs through their mobile devices. With a 4.6-star rating, the application positions itself as a convenient tool for daily health assessment, particularly for users concerned about respiratory or cardiovascular conditions who require consistent monitoring outside clinical settings. The application's core functionality centers on non-invasive blood oxygen saturation (SpO2) and heart rate measurement through iPhone sensors or Apple Watch integration. The system generates detailed logs of measurements over time, allowing users to track trends and patterns. A notable feature includes customizable alert thresholds that notify users when readings fall below predetermined levels. The app also compiles comprehensive reports formatted for medical professionals, complete with timestamped data and trend analysis that can be exported or shared directly with healthcare providers. User experience demonstrates thoughtful design with an intuitive interface that prioritizes readability of vital statistics. The dashboard presents current readings alongside historical data through clear visualizations, including graphs and color-coded indicators. Real-world usage patterns show most users engage with the app for daily check-ins, with particular utility during physical activities, sleep monitoring, or for those managing chronic respiratory conditions. The Apple Watch integration enables continuous monitoring throughout daily activities without requiring manual measurements. User feedback consistently highlights the application's reporting functionality and data reliability. Reviewer Rikeita (July 9, 2025) notes appreciation for 'the report I can share with my health care provider,' while Brooke7904 (June 2, 2025) emphasizes how the automated logging 'saves me time from trying to track it myself' for asthma management. JerryD74 (June 24, 2025) praises the 'customized reports daily,' indicating satisfaction with the personalized data presentation. These reviews suggest particularly strong adoption among users with specific medical monitoring needs. The application demonstrates clear strengths in data organization and medical integration, though limitations exist regarding sensor accuracy compared to medical-grade equipment. While suitable for trend monitoring and general wellness tracking, the app should not replace professional medical devices for diagnostic purposes. Ideal use cases include fitness enthusiasts tracking workout recovery, individuals with respiratory conditions monitoring daily fluctuations, and health-conscious users seeking proactive wellness insights between medical appointments.