Blood Oxygen Tracker – SpO2
MedicalHealth & Fitness

Blood Oxygen Tracker – SpO2

Anastasiia Martynovets · released 31 Jul 2026 · Open in App Store ↗

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Description

Blood Oxygen Tracker brings your blood-oxygen, heart-rate, and sleep data from

Apple Health into one clear timeline, with trends, overnight views, widgets,

and notifications for newly synced readings at or below your chosen threshold.

IMPORTANT: An iPhone alone cannot measure blood oxygen. Automatic SpO2 import

requires a compatible Apple Watch or a pulse oximeter whose app writes readings

to Apple Health. Blood-oxygen features and availability vary by device, country,

and region. You can also log readings manually and estimate your heart rate using the iPhone camera.

APPLE HEALTH HISTORY

View blood-oxygen and heart-rate readings from Apple Health

See 7-, 30-, and 90-day trends, statistics, and tagged context

Import readings from compatible Apple Watch and pulse-oximeter apps

Log blood oxygen and heart rate manually

See recent information at a glance with home-screen widgets

SLEEP & OVERNIGHT OXYGEN

Review overnight blood-oxygen readings alongside your sleep window

See minimum, average, and time below your chosen threshold

Get an overnight summary when compatible sleep and oxygen data are available

THRESHOLD NOTIFICATIONS*

Choose your own caution and low thresholds

Receive a notification when a newly synced reading is at or below your

selected threshold

See when each reading was recorded and synced

HEART RATE & GUIDED BREATHING

Estimate heart rate using your fingertip, the iPhone rear camera, and flash

Camera heart-rate results are clearly presented as estimates, not medical

measurements

Complete guided breathing sessions with visual pacing

Add tags and notes such as resting, after exertion, medication, oxygen flow,

or altitude

APPLE WATCH COMPANION

Glance at heart-rate and blood-oxygen readings already recorded in Apple

Health

Log blood oxygen and heart rate manually

Complete guided breathing sessions without opening your iPhone

Follow step-by-step guides for recording supported readings with Apple

features and viewing the synced result

Requires watchOS 9 or later

SHAREABLE PDF REPORTS

Export a PDF with a selected date range, statistics, distributions,

below-threshold context, tags, and notes

Reports include a Sources section for health and wellness information

Health readings remain on your device and in Apple Health

*Threshold notifications require a compatible device or app that records

blood-oxygen readings in Apple Health. Notifications are delivered only after

new readings sync to your iPhone, may be delayed, and are not real-time alarms

or emergency alerts.

Blood Oxygen Tracker is designed for general wellness and informational

purposes. It is not a medical device, does not diagnose, treat, or prevent any

disease, and is not a substitute for professional medical advice. If you feel

unwell or a reading concerns you, contact a qualified healthcare professional.

Sources for health and wellness information are available inside the app at

More → Sources & references.

Premium unlocks Apple Watch reading details, full trends and filters, overnight

sleep views, low-reading notifications, and PDF exports. Payment is charged to

your Apple ID account. Subscriptions renew automatically unless cancelled at

least 24 hours before the end of the current period. Manage or cancel your

subscription in Apple Account settings.

Terms of Use: https://oxygenlog.com/terms

Privacy Policy: https://oxygenlog.com/privacy