Comparison

iThermonitor vs Blood Oxygen App

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

iThermonitor

Continuously monitor your child's temperature with real-time data collection and analysis. Receive high temperature alerts and access expert fever management information. Track temperature trends and sync data with your health app for comprehensive care.

Highlights
  • 24/7 temperature monitoring
  • Real-time high temperature alerts
  • Temperature trend charting
  • Professional data analysis
  • Fever management information
  • Multi-child support
  • Health app integration
Features
Currently charting
Read full description

The most exciting update of iThermonitor app ever! Besides the brand-new user interface, the Temperature Analysis shows the highest temperature and the duration of fever for each episode. The Temperature Trend Chart combines temperature chart and fever related events, enabling the doctor to understand your child’s fever progression in a more informed way. For those who have more than one child, one smartphone can now connect with multiple iThermonitor sensors. 24/7 MONITORING - Connecting with the iThermonitor sensor, this app collects temperature data every 4 seconds and develops a temperature chart. HIGH TEMPERATURE ALERT – The app captures your child’s abnormal temperature in real time so that you can take necessary actions immediately. DATA ANALYSIS - Professional data analysis of body temperatures through collaboration with Boston Children’s Hospital, affiliated hospital of Harvard Medical School. FEVER TIPS- Free access to the Fever Management Information framework – Thermia, licensed from Boston Children’s Hospital, the #1 pediatric hospital in the US. ANYWHERE, ANYTIME – For parents and grandparents, wherever you are, you can always monitor your children’s temperature. iThermonitor has integrated with the Health App and you can sync body temperature data to the Health app (requires iOS8). Purchase on Amazon: http://t.cn/RwBpOPy Website: http://en.raiing.com/ Feedback: support@raiing.com Facebook: https://www.facebook.com/pages/iThermonitor/282296251955418 Twitter: https://twitter.com/RaiingMed

About

Blood Oxygen App

Monitor blood oxygen levels and heart rate using your phone's camera or by syncing with your Apple Watch. Track vital signs, share data with your doctor, and access curated health articles. Includes breathing exercises and sleep reports.

Highlights
  • Blood oxygen monitoring
  • Heart rate estimation via camera
  • Apple Watch sync
  • Data logging and export (PDF)
  • Box breathing exercises
  • Sleep reports
Features
Currently charting
Read full description

Monitor your blood oxygen level and heart rate effortlessly with our app and sync your Apple Watch to get alerts about low levels.* Are you worried about your oxygen levels dropping or wondering how your activities affect your blood oxygen? Our app makes it easy to track these vital signs wherever you go. Track and log your vital signs to share with your doctor later, or stay informed about your cardiovascular health with curated articles—all in one app. But hang on, there's more: • Take an oxygen test effortlessly, and conveniently record and monitor your data. • Use your phone’s camera to estimate your heart rate and then easily log your data afterward. • Sync and store your data in Apple Health or retrieve your blood oxygen and heart rate readings from Apple Health. • Log and easily export your blood oxygen and heart rate data into PDF to share with your doctor. • Regain your calm after a stressful experience by practicing box breathing, all within the app! • Receive sleep reports to assist you in achieving your sleep goals. (requires an Apple Watch Series 3 or later with watchOS 8) *Please be aware that to receive push notifications regarding changes in your blood oxygen level or heart rate, you will need an external device such as a pulse oximeter or a smartwatch. Blood Oxygen App is free to download and utilize. However, users can opt for a subscription to access additional features. Your subscription will automatically renew and you’ll be billed based on the plan you choose. You can cancel your subscription at any time in the App Store. Disclaimer: For wellness use only. The App is intended to improve your awareness of general wellness. The App can't be used for diagnostics or medical purposes. The App does not diagnose, treat, mitigate, or prevent any disease, symptom, disorder, or abnormal physical state. Always seek a health care professional or emergency services if you believe you may have a medical issue. Terms of use: https://aboutmeapps.com/terms-of-use/ Privacy policy: https://aboutmeapps.com/privacy-policy/

Screenshots

iThermonitor1 screens
Blood Oxygen App4 screens

Verdict

The call

The clearest difference is rating: Blood Oxygen App at 4.6 against iThermonitor's 2.7. Blood Oxygen App also leads on ratings volume (31K vs 314) and update cadence (every 2 weeks vs every 2 months). iThermonitor's advantage is in-app purchases (none vs 14) and iOS requirement (10.0 vs 15.0). On price, ads and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Blood Oxygen App sells 10 in-app purchases, starting at $2.99 per 7 days. iThermonitor asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Blood Oxygen App holds the better App Store score, 4.6 against 2.7. That said, the two scores are not equally well evidenced: Blood Oxygen App has 31K ratings behind it against 314, so its average is the more settled of the two. Written reviews point the same way: 15% of iThermonitor's written reviews are positive against 26% of Blood Oxygen App's.

UpkeepUpdate frequency

iThermonitor ships an update every 2 months, Blood Oxygen App every 2 weeks. The most recent releases landed on October 26, 2026 and October 27, 2026 respectively.

Scorecard8 real differences · 3 level
iThermonitor versus Blood Oxygen App: the parameters behind the verdict, then further details
ParameteriThermonitorBlood Oxygen App
PriceFreeFree
Rating2.7 (314 ratings)4.6 (31K ratings) — better
Positive reviews15.2% of reviews25.7% of reviews — better
Number of ratings31431K — better
Update frequencyEvery 2 monthsEvery 2 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFreemium
Best chart rank#138#32 — better
DevicesiPhone, iPad, iPodiPhone, iPod, Apple Watch
Requires iOS10.0 — better15.0
Further details — not scored
Size53 MB317 MB
Age rating12+12+
DeveloperRaiing Medical CompanyAboutMe Apps, Inc.

Customer experience

iThermonitor

All ratings310 ratings
Positive39.0%
Neutral11.0%
Negative50.0%
Written reviews125 reviews
Positive15.2%
Neutral7.2%
Negative77.6%

Blood Oxygen App

All ratings31,367 ratings
Positive89.9%
Neutral4.5%
Negative5.5%
Written reviews855 reviews
Positive25.7%
Neutral3.5%
Negative70.8%

User reviews

iThermonitor

From 314 App Store ratings

What we love

  • ✅ Accurate temperature readings when working properly
  • 🛡️ Effective fever monitoring without disturbing sleep
  • 📱 Remote monitoring capability (when functioning)
  • 🔔 Customizable temperature alerts and notifications
  • ⏱️ Long-term reliability for some users (5+ years)

Room to improve

  • ❌ Requires external hardware device not clearly disclosed
  • 🔗 Broken purchase links and unavailable sensors
  • 📉 Product appears discontinued or abandoned
  • 🚫 Misleading app store description and marketing
  • 🔌 Requires proximity to device (5-10 feet range)

Blood Oxygen App

From 31K App Store ratings

What we love

  • ⭐ Awesome app
  • ⭐ Very easy to use
  • ⭐ Helpful for monitoring health conditions
  • ⭐ Detailed data logging

Room to improve

  • ❌ Doesn't accurately measure blood oxygen levels
  • ❌ Requires premium subscription for key features
  • ❌ Inconsistent and unreliable performance
  • ❌ Deceptive marketing and false advertising
  • ❌ No way to contact customer support

Bugs and requests

iThermonitor

Reported bugs

13 issues
  • App crashes immediately after login
  • Cannot enter birthdate in profile setup
  • Remote mirroring functionality broken after updates
  • Device connection wheel spins indefinitely
  • Password reset feature non-functional
Show 8 more
  • Paste disabled in password field
  • Watch app only displays 'Log in on iPhone' message
  • Blank screens on app launch
  • Constant disconnection requiring manual reconnection
  • Profile data changes unexpectedly (birthday month resets)
  • Cannot pair with Apple Watch despite claims
  • Sign-up process fails for adult users
  • App loses all data after updates

Requested features

11 requests
  • Apple Watch native integration and complications
  • Cloud synchronization and multi-device mirroring
  • Expanded temperature range settings (below 95°F)
  • Selective alert controls (high/low temperature separately)
  • Data export in text/CSV format instead of images
Show 6 more
  • Larger, more readable fonts for iPad viewing
  • Device status indicator with color-coded LED
  • Ability to delete medicine reminder notifications
  • Extended Bluetooth range for remote monitoring
  • Adult-only profile option
  • Improved adhesive patches or alternative attachment methods

Blood Oxygen App

Reported bugs

3 issues
  • App crashes and freezes frequently
  • Inaccurate heart rate and oxygen level readings
  • Compatibility issues with certain Apple Watch models

Requested features

3 requests
  • Add audible/vibration alerts for low oxygen levels
  • Improve automatic oxygen level monitoring
  • Provide more control over reading frequency

In-app purchases

None

iThermonitor

No in-app purchases

10 purchases

Blood Oxygen App

Subscriptions10
  • Premium features set$2.997 Days
  • Pulse oximeter for Apple Watch3 Days trial$9.991 Month
  • Premium month$9.991 Month
Show 7 more
  • Premium month2 variants$12.991 Month
  • Premium features (all)7 Days trial$19.991 Year
  • Premium$19.991 Year
  • Premium features set7 Days trial$24.991 Year
  • Premium features set$24.991 Year
  • Blood Oxygen+Body Temperature$29.991 Year
  • Premium year$39.991 Year

Questions

Is iThermonitor free?
iThermonitor is free to download, with no in-app purchases.
Is Blood Oxygen App free?
Blood Oxygen App is free to download, with in-app purchases available.
Which has better reviews, iThermonitor or Blood Oxygen App?
Blood Oxygen App is rated higher. iThermonitor averages 2.7 out of 5 from 314 ratings, while Blood Oxygen App averages 4.6 from 31K ratings.
Do iThermonitor or Blood Oxygen App have ads?
Neither iThermonitor nor Blood Oxygen App shows ads.
Which is updated more often, iThermonitor or Blood Oxygen App?
iThermonitor ships an update every 2 months, and Blood Oxygen App every 2 weeks. Most recently, iThermonitor was updated on October 26, 2026 and Blood Oxygen App on October 27, 2026.
Which is more popular, iThermonitor or Blood Oxygen App?
iThermonitor currently peaks at #138 in the App Store charts, and Blood Oxygen App at #32. Chart position reflects recent download velocity rather than total install base.

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