HR & SpO2 - Companion App

This iPhone companion app is optimized for the US version of the Apple Watch, allowing you to sync and display your iPhone's blood oxygen data on your Apple Watch.

The new heart rate and SpO₂ charts, widgets, and adjustable SpO₂ threshold notifications are now available in the major 2.0 update!

*iPhone Companion App Instructions This iPhone companion app is specifically optimized for US-version Apple Watches that cannot read local SpO₂ data directly from the watch. It adds a health data synchronization feature between the iPhone and Apple Watch. US-version users should uninstall the standalone Apple Watch app first before using this companion version, and keep both this iPhone companion app and the Apple Watch app running in the background during use. Non-US version Apple Watches will automatically read local SpO₂ data from the watch without any extra setup.

Core Highlights

Two Metrics in One, All at a Glance

• Dual-Metric Display: Seamlessly integrates heart rate and SpO₂ data in one view. Scroll the Digital Crown to switch.
• Full-Style Complications: Beautiful widgets supporting corner, circular, textual, and modular layouts for your watch face.
• Rich Tracking: Instantly read real-time data and full cycle fluctuations (Today, 4/12/24h, Week) on your wrist. Includes resting/walking averages.
• Alert Interaction: Triggers striking visual shifts, haptics, and push notifications when blood oxygen drops below your set value.
• Premium UI & AOD: Fully native components with liquid glass visuals. Supports Always-On Display (AOD) to save power while keeping core data.
• Smart Stack: Deeply integrates with watchOS Smart Stack for high efficiency.
• Purely Local: Reads Apple Health via HealthKit. All data is processed locally with zero server caching to protect privacy.

Tactile Native Feel, Visible Glass Aesthetics

• New-Gen UI: Built for latest watchOS. Fully native controls with unique liquid glass visuals.
• Immersive Animations: Heart rate background pulses with your heartbeat (long-press for pulse rhythm). SpO₂ blue ring flows like breath and changes color for warnings.

Deeply Integrated into the Native Apple Watch Ecosystem

• Watch Face Adaptation: Matches corner, circular, text, and rectangular styles perfectly.
• Always-On Display (AOD): Hides backgrounds/animations to save power while keeping core data active. Wakes up instantly.
• Smart Stack Linkage: Efficiently presents core data while harmoniously coexisting with other cards.

Purely Local Execution, Guarding Your Privacy Line

• Native HealthKit Access: Directly reads official health data from Apple Health.
• Purely Local & Secure Processing: All data is analyzed and rendered exclusively on your local device—no uploads, no tracking, and no server caching, ensuring rock-solid privacy and security.

Exclusive Features for the iPhone Companion App

• Quick access to combined widgets on your iPhone Lock Screen.
• 4 home screen widgets to display complete today/24h health trends.
• Smart Stack widget supports switching today/24h combined data via iPhone companion app.
• Adjustable low blood oxygen notification thresholds between 85% and 95%.

Giving Rhythm to Heartbeats, Giving Color to Breathing This is more than just a widget—it is a piece of liquid aesthetic art that lives on your wrist. Every time you raise your hand, it is a visual delight; every pulse is a guardian of your health. Combine your dual metrics now and unlock your own futuristic wrist health aesthetic.

*The data provided by this application is for daily health management reference only and does not serve medical diagnostic or prescriptive functions. If you feel unwell, please seek medical attention promptly or follow professional medical advice.