9+ similar apps compared and reviewed
Whether you want more options like O2 Buddy or a completely different take on the same concept, our curated list of 9+ similar apps has you covered. Updated for 2026 with the latest ratings and comparisons.
This app monitors your heart rate to wake you up at the optimal moment during naps, reducing grogginess. It offers custom nap lengths and an 'Infinity Nap' mode for rest without a timer. All processing is done locally for privacy.
This app displays your most recent health metrics directly from your Health app. It offers complications for watch faces to show data at a glance. It does not collect or measure any new health information.
Monitor your wrist temperature trends directly from your Apple Watch. Visualize data with clear graphs, track sleep and heart rate, and sync seamlessly with Apple Health. Understand your body's patterns over time.
Track your daily time in the sun to achieve personalized goals for Vitamin D, tanning, or general well-being. Get smart guidance, exposure notifications, and forecasts to enjoy sunlight safely.
This app provides data-driven insights for self-coached athletes to optimize performance and recovery. It offers a daily readiness score, tracks training load and progress, and analyzes workouts with advanced metrics. Designed for runners, cyclists, and swimmers who prioritize informed training.
This app uses your Apple Watch to monitor stress levels through heart rate variability and heart rate data. It provides insights into daily fluctuations, potential triggers, and correlations with sleep and activity, helping you manage your well-being.
This app acts as an early warning system for potential illness by monitoring wrist temperature trends and analyzing vital signs. It provides proactive health alerts and personalized insights to help you take action before symptoms appear.
Quickly access key health metrics directly from your wrist. This app provides beautifully designed complications and widgets for easy viewing of steps, heart rate, and more. Search for specific metrics with simple text input.
Track your daily sunlight exposure and Vitamin D absorption with this app. It provides real-time weather data, sunrise/sunset notifications, and golden hour countdowns. Monitor your progress with detailed charts and stay motivated with goals and streaks.
