# iFORA O2 — Sleep SpO2 HRV Breathe Balance

> Sleep, HRV, and breathing analysis with guided biofeedback exercises. (iPhone/iPad app by ForaCare Inc..)

- Source: https://appshunter.io/ios/app/ifora-o2/id1454493018 (this page in markdown: same URL + `.md`)
- Developer: [ForaCare Inc.](https://appshunter.io/developer/528184928)
- Category: Health & Fitness
- Price: Free with in-app purchases
- Rating: 3.80/5 from 18 App Store ratings · 32 written reviews indexed
- Age rating: 12+
- Requires: iOS 14.0 · 53 MB
- Languages: American English, Japanese, Chinese (Traditional, Taiwan)
- Released: 2019-04-07
- Data updated: 2026-08-11
- Monetization: freemium
- User reviews in markdown: https://appshunter.io/ios/app/ifora-o2/id1454493018/reviews.md

## What is iFORA O2?

iFORA O2 is a total solution help you analyze and improve sleep apnea and mindbody related problems. 
The App integrates with FORA Bluetooth Pulse Oximeter and Intelligent Cloud Analysis System to provide three main features: 1. Sleep SpO2 analysis, 2. HRV analysis, 3. Resonance Breath (HRV Biofeedback).
-----------------------
1. Sleep SpO2 analysis

1-1. records the whole night of SpO2 and heart rate readings with sampling rate of 1 sample per second.

1-2. provides analysis report with SpO2/heart rate trend chart and the following parameters related to sleep apnea:
(1) lowest SpO2, (2) highest SpO2, (3) average SpO2, (4) ODI3%, (5) ODI4%, (6) CT90%, (7) overall Sleep SpO2 classification ...etc. 

The report (pdf format) could be sent to user registered email address

1-3. provide history Sleep SpO2 report for check

Sleep SpO2 analysis help test the severity of oxygen saturation deficiency. It could be used for not  only risk screening but also for treatment improvement tracking

1-4. analysis and recommendation
personalized analysis and recommendation based on multi-night test results and questionnaire

1-5. sleep note
possible apnea improvement solutions in sleep note (e.g. CPAP, nasal breath, side sleep, pillow) - help user find suitable solution

-------------------------------------
2. HRV (Heart rate variability) analysis

2-1. provides heart rate variability analysis (Autonomic Nervous System Analysis) with 5 parameter: 
- SDNN (overall Autonomic Nervous System index)
- LF (Sympathetic Nervous Combo index)
- HF (Parasympathetic Nervous index)
- LF/HF (Balance index)
- heart rate

2-2. provides classification of overall HRV score and individual suggested range for each parameter

2-3. provides knowledge of possible Causes, Risks and Notice for HRV scores outside suggested range
(e.g. sleep disorder, stress level, diseases...etc.)

---------------------------------------
3. Resonance Breath (HRV biofeedback)

3-1. provides visual Guidance for breathing exercise and biofeedback of user’s condition

3-2. supports 7 types of breathing exercise frequency: 4.5, 5, 5.5, 6, 6.5, 7, 7.5 BPM. User could scan and test the most suitable frequency for him to exercise

3-3. support 'Resonance' and 'Coherence' parameter to help user scan and test the most suitable breathing frequency for him

=============================

iFORA O2 provide free basic function and three advanced function that need subscription. 
feature summary link:

http://foracare.com/app/content2/app_feature_en.pdf

Subscription pricing and terms:
iFORA O2 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 (HRV Biofeedback).

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.

Terms of service:
http://foracare.com/app/content2/terms_en.pdf
Privacy policy:
http://foracare.com/app/content2/privacy_en.pdf
================================

The iFORA O2 App needs to pair with the FORA SpO2 Bluetooth Pulse Oximeter to work.
Google Search: FORA SpO2

FORA homepage: https://foracare.com

This APP will access and update your Health data to synchronize with Apple HealthKit.
EULA: 
https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ 
================================

The iFora O2 app has integrated with Apple Health, allowing you to import health data such as steps, heart rate, sleep status, and exercise information. This integration helps you synchronize and manage your health information effectively.

## Key features

- Sleep SpO2 and heart rate tracking
- Sleep apnea risk screening
- Heart rate variability (HRV) analysis
- Guided breathing exercises
- HRV biofeedback
- Personalized recommendations
- Exportable PDF reports

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| HRV Monthly Membership | $3.99 | per month |
| Sleep SpO2 Month Membership | $9.99 | per month |
| Breath Monthly Member | $1.99 | per month |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| 1 License | $2.99 | one-time |


## Recent user reviews (10 of 32)

All indexed reviews: https://appshunter.io/ios/app/ifora-o2/id1454493018/reviews.md

### 5/5 — 開始APP時YouTube會停止

*2026-01-21, version 3.3.2*

你好
收聽YouTube時開啟iFORA O2，YOUTUBE會自動停止播放，請問如何改善？

### 3/5 — 連線以及資料接收失敗

*2026-01-12, version 3.3.2*

明明就有戴著，也確定電有超過50%但是…卻無睡眠資料。連線也要多次嘗試😓

### 1/5 — APP真的很瞎

*2025-08-08, version 3.2.6*

ㄧ直連不到
超難用

### 2/5 — 失望

*2025-07-12, version 3.2.5*

看思思醫師推薦才買，結果APP超爛，常常連線不上，或者記錄丟失，都改過多少版本了還這麼不穩！要不是想支持台廠，其實可以直奔三星..
APP真正爛，所以不可能有意願訂閱去了解其他資訊

### 3/5 — 連線失敗

*2025-02-10, version 3.1.0*

更新過後App一打開就會顯示連線失敗，整個軟體都不能使用，再麻煩儘速修正～～

另外app更新完後戒指前一天的睡眠記錄都消失了😮‍💨
還有最近戒指都偵測不到跑步的時長，常常顯示無資料😭

### 1/5 — 連線問題

*2025-02-09, version 3.1.0*

近期在白天時常顯示連線失敗，同步超慢，使用上很不方便。

### 5/5 — 版本更新後出現要email 認證 如何解決

*2024-01-28, version 3.0.0*

2023.3.7就認證了

### 2/5 — 怎麼註冊？

*2022-05-02, version 1.9.3*

一打開app就跳出就出現叫我註冊或是舊帳號登入，可是找不到地方可以註冊？是不是註冊需要你們提供連結才可以？要付費的意思？

### 1/5 — Email帳號

*2021-06-03, version 1.8.15*

收到兩筆從日本飯店下單和樂天購物的日文email通知

### 1/5 — 騙人的，還是要搭配血氧計。

*2021-05-30, version 1.8.15*

不要下載。

## Frequently asked questions about iFORA O2

### What is iFORA O2 used for?

iFORA O2 is a health and fitness app designed to analyze sleep quality, heart rate variability (HRV), and provide guided breathing exercises. It helps users understand and improve issues related to sleep apnea and mind-body balance.

### Does iFORA O2 have ads?

No, iFORA O2 does not contain advertisements. The app offers basic functions for free and provides advanced features through optional subscriptions.

### What are the subscription costs for iFORA O2?

iFORA O2 offers three monthly subscription plans: $1.99/month for Breathing (HRV Biofeedback), $3.99/month for HRV analysis, and $9.99/month for Sleep SpO2 analysis.

### How accurate is iFORA O2's sleep SpO2 analysis?

The app records SpO2 and heart rate readings at a sampling rate of 1 sample per second throughout the night. It provides detailed analysis reports including lowest, highest, and average SpO2, along with parameters like ODI3%, ODI4%, and CT90% to assess sleep apnea severity.

### Can I share my iFORA O2 reports with my doctor?

Yes, iFORA O2 can generate analysis reports in PDF format, which can be sent to your registered email address. This allows for easy sharing of your sleep and HRV data.

### What breathing exercises are available in iFORA O2?

iFORA O2 supports 7 types of breathing exercise frequencies, ranging from 4.5 to 7.5 BPM. It provides visual guidance and biofeedback to help users find the most suitable frequency for their practice.

### What devices is iFORA O2 compatible with?

iFORA O2 is compatible with iPhones and iPods. It integrates with FORA Bluetooth Pulse Oximeters for data collection.

### How often is iFORA O2 updated?

The latest version of iFORA O2 is 3.3.4, and it was last updated on March 23, 2026. This indicates a relatively recent update, suggesting ongoing development and support.

## Version history (last 5 releases)

### 3.3.7 — 2026-08-08

improve user experience

### 3.3.6 — 2026-07-27

improve user experience

### 3.3.5 — 2026-05-21

improve user experience

### 3.3.4 — 2026-03-23

improve user experience

### 3.3.3 — 2026-03-20

improve user experience

## Apps similar to iFORA O2

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [O2 Care - SpO2 HRV Biofeedback](https://appshunter.io/ios/app/o2-care-spo2-hrv-biofeedback/id1406652200) | 2.7 (46) | Free | Health & Fitness |
| [Welltory: Health, Heart Rate](https://appshunter.io/ios/app/welltory-health-heart-rate/id1074367771) | 4.7 (131,337) | Free | Health & Fitness |
| [Pillow: Sleep Tracker](https://appshunter.io/ios/app/pillow-sleep-tracker/id878691772) | 4.4 (95,607) | Free | Health & Fitness |
| [SleepWatch - Top Sleep Tracker](https://appshunter.io/ios/app/sleepwatch-top-sleep-tracker/id1138066420) | 4.7 (328,464) | Free | Health & Fitness |
| [Sleep Cycle - Tracker & Sounds](https://appshunter.io/ios/app/sleep-cycle-tracker-and-sounds/id320606217) | 4.7 (27,516) | Free | Health & Fitness |
| [AutoSleep: Watch Sleep Tracker](https://appshunter.io/ios/app/autosleep-watch-sleep-tracker/id1164801111) | 4.7 (61,495) | $8.99 | Health & Fitness |

## Related topics

[2breathe lite](https://appshunter.io/ios/topics/2breathe-lite)

---

*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 2026-08-11.*