Reviews of Blood Oxygen | O2 Monitor app+

By: Yana Shestakova

List of user reviews and ratings for Blood Oxygen | O2 Monitor app+

Total ratings

4.60 (Rating count: 418)

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Review summary

User reviews repeatedly flag the app as inaccurate or nonfunctional for measuring blood oxygen, criticize the subscription/trial model as misleading or overpriced, and note that it offers little value beyond what Apple Health provides. Several reviews mention difficulty using the app and lack of clear guidance or essential features. Overall, main concerns center on accuracy, payment model, and absence of meaningful capabilities.

Pros

No clear positive benefits consistently mentioned in user reviews.

Cons

Inaccurate or unreadable oxygen data: the app does not measure or is unreliable for blood oxygen saturation.
Subscription model concerns: free trial issues and inability to cancel, with perceived misleading pricing.
Lack of essential functionality: fails to provide current oxygen readings, is redundant with Apple Health, and offers limited standalone value.
Confusing user experience: unclear how to measure blood oxygen and absence of a dedicated test button.

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User Reviews

Recent rating average: 1.50

All time rating average: 4.60

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82% (9)

Date	Author	Comment
2026-03-19	Mr*****	This is a scam does measure oxygen and won’t let you cancel during free trial
This is a scam does measure oxygen and won’t let you cancel during free trial
2025-07-08	Ww*****	Wow
Wow
2025-06-28	Pa*****	Does not measure O2 saturation.
Does not measure O2 saturation.
2025-04-20	Pe*****	Subscription service
Subscription service
2024-11-10	JW*****	The app isn’t accurate at all. The subscription is a scam because you can’t try the app before paying. I verified the results of the pulse with a known good device. The app was off by 20 BPM. The description leads you to believe that it reads the O2. It doesn’t.
The app isn’t accurate at all. The subscription is a scam because you can’t try the app before paying. I verified the results of the pulse with a known good device. The app was off by 20 BPM. The description leads you to believe that it reads the O2. It doesn’t.
2024-09-23	ca*****	This doesn’t take your blood oxygen I would like my money back. I’m very disappointed.
This doesn’t take your blood oxygen I would like my money back. I’m very disappointed.
2024-09-04	Oh*****	This does not work it will not give you a current oxygen reading
This does not work it will not give you a current oxygen reading
2024-04-08	Ki*****	It would be nice if it would read blood oxygen as well
It would be nice if it would read blood oxygen as well
2024-03-25	ya*****	It just does 3 things: 1. pulls your oxygen and heart rate data from apple health and shows it to you (which you can already do in apple health) 2. Allows you to manually type in heart rate and oxygen data (which you can already do in apple health) 3 allows you to measure heartbeat using the iPhone camera app (which other apps do for free) So in sum. This is a total waste of storage space and no value to me. And it's a $10 subscription! Geez
It just does 3 things: 1. pulls your oxygen and heart rate data from apple health and shows it to you (which you can already do in apple health) 2. Allows you to manually type in heart rate and oxygen data (which you can already do in apple health) 3 allows you to measure heartbeat using the iPhone camera app (which other apps do for free) So in sum. This is a total waste of storage space and no value to me. And it's a $10 subscription! Geez
2024-02-12	pa*****	Please tell me if I need to get or buy a blood oxygen test kit or can I measure it this way I have no idea .help me please?thanks
Please tell me if I need to get or buy a blood oxygen test kit or can I measure it this way I have no idea .help me please?thanks