Blood Oxygen Tracker – SpO2
Pulse Oximeter & Heart Rate
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
See your SpO2 and heart rate trends, catch overnight dips, and take a doctor-ready PDF to your next appointment. Wellness insights, not a diagnosis.
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
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Bug fixes and stability.
• Lock Screen and Home Screen widgets now open the right screen every time,
including on the first tap after a cold start.
• Added crash reporting so reliability problems get fixed faster. Crash
reports carry only the error and a stack trace — never your blood oxygen or
heart rate values, notes, tags, or reports.
Thanks for the reports. Anything else off? help@oxygenlog.com
The developer, Anastasiia Martynovets, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Linked to You
The following data may be collected and linked to your identity:
- Purchases
- Identifiers
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Health & Fitness
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Anastasiia Martynovets
- Size
- 42 MB
- Category
- Medical
- Compatibility
Requires iOS 16.0 or later.
- iPhone
Requires iOS 16.0 or later. - Mac
Requires macOS 13.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later. - Apple Watch
Requires watchOS 9.0 or later.
- iPhone
- Languages
- English
- Age Rating
13+
- 13+
- Infrequent
Medical Treatment information
Contains
Health or Wellness Topics
- In-App Purchases
Yes
- Premium — Annual $29.99
- Premium — Monthly $14.99
- Copyright
- © @ Blood Oxygen Tracker - SpO2