Best O2 Monitor Free Apps

240+ iOS apps curated and reviewed

4.3 avg rating
20 free apps
Updated June 2026

With an average user rating of 4.3★, the o2 monitor free category is one of the App Store's strongest. Browse all 240+ apps we track, sorted so the most loved ones surface first.

Top Picks for O2 Monitor Free

Oximeter - Track Oxygen SpO2#1

Oximeter - Track Oxygen SpO2 by AVTOSTROI, OOO

Blood O2 Monitor Tracker
Editor's Choice
💪 Health & Fitness
4.5(466 ratings)
FreeIn-App Purchases
Oximeter - Track Oxygen SpO2 screenshot 1
Oximeter - Track Oxygen SpO2 screenshot 2
Oximeter - Track Oxygen SpO2 screenshot 3
Oximeter - Track Oxygen SpO2 screenshot 4

"Monitor and track your Oxygen Saturation levels with detailed analytics and daily care guides using our personal health management app. Sync data with Apple Health, export to PDF, and enjoy ad-free experience. Contact us for more information or visit our Privacy Policy and Terms and Conditions for details."

Heart Rate Monitor - Pulse BPM#2

Heart Rate Monitor - Pulse BPM by Hong Kong Zane Ai Limited

Pulse: Step,Health HR&Oximeter
Strong Contender
💪 Health & Fitness
4.6😐(128K ratings)
FreeAdsIn-App Purchases
Heart Rate Monitor - Pulse BPM screenshot 1
Heart Rate Monitor - Pulse BPM screenshot 2
Heart Rate Monitor - Pulse BPM screenshot 3
Heart Rate Monitor - Pulse BPM screenshot 4

Track your heart rate with ease using Pulse BPM. Monitor your pulse in real-time, keep track of your health, and stay on top of your fitness goals. Download now and take control of your heart health!

What We Love

  • 👍 Accurate heart rate measurements
  • 📊 Helpful for tracking health conditions
  • 🗓️ Ability to save and review past readings
  • 💻 Easy to use interface

Room to Improve

  • 📺 Excessive advertisements that interfere with usage
  • 🔒 Subscription required for full functionality
  • 🔢 Limited number of free daily measurements
Instant Heart Rate: HR Monitor#3

Instant Heart Rate: HR Monitor by Bodymatter, Inc.

Pulse Tracker & Stress Test
Worth Considering
💪 Health & Fitness
4.9😐(229K ratings)
FreeAdsIn-App Purchases
Instant Heart Rate: HR Monitor screenshot 1
Instant Heart Rate: HR Monitor screenshot 2
Instant Heart Rate: HR Monitor screenshot 3
Instant Heart Rate: HR Monitor screenshot 4
Instant Heart Rate: HR Monitor screenshot 5
Instant Heart Rate: HR Monitor screenshot 6

Track your heart rate instantly using your smartphone camera. Get real-time heart rate measurements, track your fitness progress, and stay on top of your health goals with ease. Download now and take control of your heart health.

What We Love

  • 🚀 Accurate heart rate measurements
  • 📊 Helpful for monitoring heart health
  • 💾 Saves and tracks heart rate history
  • 🆓 Free version available

Room to Improve

  • 🔒 Requires account creation to use
  • 💰 Expensive subscription for full features
  • 📢 Intrusive ads in free version

More O2 Monitor Free apps to explore

4
Blood Oxygen App
Blood Oxygen App
Blood Oxygen App
SpO2 Level Monitor・Heart Rate
Free

Monitor your blood oxygen level and heart rate effortlessly with our app and sync your Apple Watch for alerts about low levels. Easily track and log vital signs, take oxygen tests, estimate heart rate with the camera, and practice box breathing for calm—all in one app. Download now for free and stay informed about your cardiovascular health.

🏥 Medical
(31K)
5
InPulse - Heart Rate Monitor
InPulse - Heart Rate Monitor
InPulse - Heart Rate Monitor
Log Blood Pressure & Oxygen
Free

Monitor your heart rate and log blood pressure easily with this application. Track your health metrics and stay informed about your cardiovascular well-being. Download now for a comprehensive view of your heart health.

💪 Health & Fitness
(166K)
6
Oximeter Tracker Pulse Measure
Oximeter Tracker Pulse Measure
Oximeter Tracker Pulse Measure
O2, pulse calculator: Tracker
Free

Track and monitor your blood oxygen levels easily with this app. Record data, track symptoms, view history, create multiple profiles, and sync with Health Kit for pulse and oxygen information. Remember, it's not a medical device, consult a doctor for accurate readings. Start taking control of your oxygen levels today!

🏥 Medical
(28)
7
Blood Oxygen Level
Blood Oxygen Level
Blood Oxygen Level
Record pulse and oxygen level
Free

Track your pulse and blood oxygen levels daily with ease using this app. Simply record your measurements and view your statistics over time. Get started now to monitor your health more effectively!

🏥 Medical
(1.8K)
8
Pulse Plus: Heart Rate Monitor
Pulse Plus: Heart Rate Monitor
Pulse Plus: Heart Rate Monitor
Blood Pressure・Oxygen Tracker
Free

Track your heart rate and blood pressure with ease using Pulse Plus. Monitor your health trends and stay on top of your well-being. Download now for a healthier you!

💪 Health & Fitness
(3.6K)
9
Blood Oxygen | O2 Monitor app+
Blood Oxygen | O2 Monitor app+
Blood Oxygen | O2 Monitor app+
Saturation Level + Pulse Rate
Free

Monitor your oxygen saturation levels and pulse rate daily with this essential tracker app. Keep track of your health, set normal levels, sync data to Apple Health, and enjoy features like multi-profile support and daily reminders. Stay informed and stay healthy!

🏥 Medical
(379)
10
Welltory: Health, Heart Rate
Welltory: Health, Heart Rate
Welltory: Health, Heart Rate
Stress, Sleep, BP, O2 Monitor
Free

Monitor heart rate, stress level, and blood pressure with this app designed to help you track and improve your overall well-being. Take control of your health today with real-time data and personalized insights. Download now to start your wellness journey!

💪 Health & Fitness
(129K)
11
Blood Oxygen App+
Blood Oxygen App+
Blood Oxygen App+
Heart Rate Monitor Diary
Free

Track and monitor your blood oxygen level and heart rate with a modern and user-friendly app. Easily log your measurements, access recent data, and export information. Remember, this app is not a substitute for professional medical advice.

🏥 Medical
(471)
12
Blood Oxygen App- Watch
Blood Oxygen App- Watch
Blood Oxygen App- Watch
Log & track pulse o2 levels
Free

Track and monitor your blood oxygen levels with ease using this app on your smartwatch. Stay informed about your health on the go. Download now for peace of mind.

🏥 Medical
(601)
13
Blood Oxygen
Blood Oxygen
Blood Oxygen
by Apple Distribution International
Free

Monitor your blood oxygen levels directly from your wrist with the app, providing on-demand measurements and insights into your overall wellness. Get periodic background measurements throughout the day and store all data in the Health app on your iPhone.

💪 Health & Fitness
(128)
14
Annie Baby Monitor: Nanny Cam
Annie Baby Monitor: Nanny Cam
Annie Baby Monitor: Nanny Cam
Baby Video Camera - WiFi Cloud
Free

Annie Baby Monitor is a top-rated mobile app that offers crystal-clear video, audio monitoring, night vision, and smart notifications to assist parents in caring for their children. With features like remote child unit start and lullabies, it provides peace of mind through versatile connectivity options and innovative functionalities.

🌟 Lifestyle
(2.4K)
15
Temperature + Blood Oxygen app
Temperature + Blood Oxygen app
Temperature + Blood Oxygen app
Thermometer & saturation level
Free

Monitor your body temperature and blood oxygen levels with ease using this innovative app. Keep track of your health metrics and stay informed about any changes. Download now for a healthier you.

🏥 Medical
(72)
16
Baby Monitor Nancy: Cloud Cam
Baby Monitor Nancy: Cloud Cam
Baby Monitor Nancy: Cloud Cam
Nanny Video Babysitting Camera
Free

Ensure your baby's safety anytime, anywhere with a nanny video babysitting camera. Monitor your baby with ease and peace of mind.

🌟 Lifestyle
(519)
17
HeartBP Monitor
HeartBP Monitor
HeartBP Monitor
Track BP, HR, Glucose & SpO2
Free
💪 Health & Fitness
(0)
18
QTAKE Monitor
QTAKE Monitor
QTAKE Monitor
by IN2CORE s.r.o.
Free

This application turns multiple devices into wireless on-set monitors, allowing for multi-camera monitoring, communication, and collaboration. It enables users to stream content, browse, play, and edit metadata, and even create custom note fields and playlists, revolutionizing workflow and on-set decision-making.

📷 Photo & Video
(8)
19
iHeart-Pulse Rate Monitor App.
iHeart-Pulse Rate Monitor App.
iHeart-Pulse Rate Monitor App.
Log body info:Smart BP Tracker
Free

Track your heart rate accurately and stay healthy with our Heartbeat Test app. Measure your heart rate daily, record your weight, and use the Step Counter function to monitor your physical activity. Stay informed about your health status and fitness levels effortlessly.

💪 Health & Fitness
(6.8K)
20
Apple Health
Apple Health
Apple Health
by Apple Distribution International
Free

The app provides a centralized hub for storing and tracking health and fitness data from various devices and third-party apps. Users can visualize their data through interactive charts, set goals, track progress, share information with caregivers, and access educational articles. Take control of your health and wellness today!

💪 Health & Fitness
(7.7K)