# O2 Care - SpO2 HRV Biofeedback — Sleep Breathe Inner Balance

> Sleep and stress analysis with SpO2, HRV tracking, and biofeedback breathing exercises. (iPhone/iPad app by Li-Ping Yang.)

- Source: https://appshunter.io/ios/app/o2-care-spo2-hrv-biofeedback/id1406652200 (this page in markdown: same URL + `.md`)
- Developer: [Li-Ping Yang](https://appshunter.io/developer/1406652199)
- Category: Health & Fitness, Medical
- Price: Free with in-app purchases
- Rating: 2.70/5 from 46 App Store ratings · 8 written reviews indexed
- Age rating: 12+
- Requires: iOS 8.0 · 39 MB
- Languages: American English, Chinese (Traditional, Taiwan)
- Released: 2019-01-14
- Data updated: 2026-07-27
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/o2-care-spo2-hrv-biofeedback/id1406652200/reviews.md

## What is O2 Care?

O2 Care App is a total solution help you analyze and improve sleep and stress related problems (e.g. sleep apnea, snore, anxiety...etc.)
It includes three main features: 1. overnight Sleep SpO2 analysis, 2. HRV analysis, 3. Resonance Breath (HRV Biofeedback).
Sleep SpO2 analysis and HRV analysis could help analyze the causes of sleep and stress problems, and also provide your current mindbody health status and potential risks. Resonance Breath (HRV biofeedback) could help you reduce stress, improve HRV score and sleep quality.
The App link with bluetooth oximeter, record SpO2, pulse, and related bio-signal, upload to cloud server for analysis.

Subscription pricing and terms:
O2 Care offers an auto-renewing monthly subscription with the below pricing
$9.99/month for Sleep SpO2
$3.99/month for HRV
$1.99/month for Breathing.

Payment will be charged to your iTunes Account. Subscriptions automatically renew unless auto-renew is turned off at least 24-hours before the end of the current subscription period. Your iTunes account will be charged for renewal, with the cost identified on the price button of the subscribed Membership, within 24-hours prior to the end of the current period. You may manage your subscription and auto-renewal may be turned off by going to your iPhone Account Setting.
Any unused portion of a free trial period, if offered, will be forfeited when you purchase a subscription, where applicable.

Terms of service:
http://foracare.com/app/content2/mbh_terms_en.pdf
Privacy policy:
http://foracare.com/app/content2/mbh_privacy_en.pdf

## Key features

- Overnight Sleep SpO2 analysis
- HRV analysis
- Resonance Breath (HRV Biofeedback)
- Bluetooth oximeter integration
- Cloud-based data analysis
- Stress reduction exercises

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Sleep SpO2 Month Membership | $9.99 | per month |
| HRV Monthly Member | $3.99 | per month |
| Breathing Monthly Membership | $0.49 | per month |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| 1 License | $2.99 | one-time |
| Month Membership | $5.99 | one-time |
| Upgrade to Month License_1 | $3.99 | one-time |
| Upgrade to Month License_2 | $1.99 | one-time |
| HRV Analysis Monthly Member | $1.99 | one-time |
| Breath Monthly Membership | $1.99 | one-time |
| Combo Monthly Membership | $2.99 | one-time |


## Recent user reviews (8 of 8)

All indexed reviews: https://appshunter.io/ios/app/o2-care-spo2-hrv-biofeedback/id1406652200/reviews.md

### 1/5 — Garbage don’t waste your time

*2021-08-14*

Absolute garbage, if you need to check your SPO2 quickly, don’t download this app because they make you create an account but you can cancel the free trial later on that’s not free.

### 1/5 — Don’t get this

*2020-12-19*

If you try to view the privacy policy it takes you to unsecured site and notes it will steal your information!

### 1/5 — Domain

*2020-10-31*

Would not accept icloud.com for domain.

### 2/5 — Chinese rip off

*2020-10-10*

Since this is written in broken Chinese-English, it comes from China. I ordered two things this past summer, unaware it from China. Both items sent a partial shipment. I ordered a small saw with small blades. I was charged $34 immediately.  Three blades showed up about a month later.  The saw never made it. PayPal would not credit it back until I sent the blades back. It cost me $29 to send it back. 
I see pulse oximeters with Bluetooth to your phone from Amazon from $29. Don’t throw your money away on this one.

### 1/5 — Not good

*2020-09-22*

Over complicated, clunky

### 3/5 — Doesn’t really do anything

*2020-03-12*

Seems to be app made to compliment their hardware products. As a stand-alone app, it does nothing that I could find. It appears it merely keeps a log of the readings their hardware supplies. I tried running it after registering and got an error that I have to connect their Bluetooth device for the app to work.

### 5/5 — Easy to use

*2020-01-31*

Easy to use for me to test and monitor sleep apnea at home

### 1/5 — Will not accept email.

*2019-12-29*

I am trying to create an account but it will not accept Comcast.net as a domain.

**Developer response:** Thank you for the feedback and sorry for the inconvenience. The email domain issue is fixed.

## Frequently asked questions about O2 Care

### What is O2 Care's primary function?

O2 Care is designed to help users analyze and improve sleep and stress-related problems. It offers overnight Sleep SpO2 analysis, HRV analysis, and Resonance Breath (HRV biofeedback) to provide insights into mind-body health and potential risks.

### How does O2 Care track health data?

The app links with a Bluetooth oximeter to record SpO2, pulse, and related bio-signals. This data is then uploaded to a cloud server for detailed analysis.

### What are the subscription options for O2 Care?

O2 Care offers three auto-renewing monthly subscriptions: $9.99/month for Sleep SpO2, $3.99/month for HRV, and $1.99/month for Breathing. Users can manage subscriptions and turn off auto-renewal in their iPhone Account Settings.

### Can I get a free trial of O2 Care subscriptions?

The description mentions that any unused portion of a free trial period, if offered, will be forfeited when you purchase a subscription. Specific details on trial availability are not provided.

### What devices is O2 Care compatible with?

O2 Care is supported on iPhone and iPod devices. It requires a Bluetooth oximeter for its core tracking functionalities.

### How often is O2 Care updated?

The latest version of O2 Care is 2.0.5, which was last updated on June 8, 2021. Further update frequency details are not available in the provided data.

### What is the age rating for O2 Care?

O2 Care has an age rating of 12+, indicating it is suitable for users aged 12 and older.

### Does O2 Care have ads?

Based on the provided data, O2 Care does not have advertisements. Its monetization is solely through its in-app purchase subscription plans.

## Version history (last 5 releases)

### 2.0.5 — 2021-06-08

add notice information

### 2.0.4 — 2020-07-27

add FORA O2 pulse oximeter product information

### 2.0.3 — 2020-02-05

improve user experience

### 2.0.2 — 2020-02-04

improve user experience

### 2.0.1 — 2020-01-31

Improve user experience

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## Related topics

[biofeedback labs](https://appshunter.io/ios/topics/biofeedback-labs) · [ensocare](https://appshunter.io/ios/topics/ensocare) · [biofeedback breathing](https://appshunter.io/ios/topics/biofeedback-breathing) · [hummingbird biofeedback](https://appshunter.io/ios/topics/hummingbird-biofeedback)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-27.*