# Heart Analyzer vs Blood Oxygen

The clearest difference is review sentiment: Heart Analyzer at 84% against Blood Oxygen's 20%. Heart Analyzer also leads on rating (4.7 vs 3.9) and update cadence (weekly vs every 9 months). Blood Oxygen's advantage is in-app purchases (none vs 7) and iOS requirement (14.0 vs 17.5). On price, ads and device support there is nothing between them.

Both are free to download. Heart Analyzer sells 7 in-app purchases, starting at $3.99 per month. Blood Oxygen asks for nothing beyond the download.

Heart Analyzer holds the better App Store score, 4.7 against 3.9. That said, the two scores are not equally well evidenced: Heart Analyzer has 22K ratings behind it against 127, so its average is the more settled of the two. Written reviews point the same way: 84% of Heart Analyzer's written reviews are positive against 20% of Blood Oxygen's.

Heart Analyzer ships an update weekly, Blood Oxygen every 9 months. The most recent releases landed on November 1, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Heart Analyzer | Blood Oxygen |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (22K ratings)](https://appshunter.io/ios/app/heart-analyzer-pulse-tracker/id1006420410/reviews)** | [3.9 (127 ratings)](https://appshunter.io/ios/app/blood-oxygen/id1505627452/reviews) |
| Number of ratings | **22K** | 127 |
| Positive reviews | **84.2% of reviews** | 20.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Weekly** | Every 9 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 54 MB | 2 MB |
| Requires iOS | 17.5 | **14.0** |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPod, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Helix Apps LTD](https://appshunter.io/developer/1479527439) | [Apple](https://appshunter.io/developer/284417353) |

## What reviewers say

### Heart Analyzer

[App page](https://appshunter.io/ios/app/heart-analyzer-pulse-tracker/id1006420410)

Gain deep insights into your heart health using data from your Apple Watch. Visualize trends, analyze metrics like Cardio Recovery and Heart Rate Zones, and generate detailed PDF reports. Offers advanced features and privacy-focused data handling.

**Highlights:** Dashboard with daily summaries, Visualized heart rate and health data charts, Health vital trend assessment, Cardio Recovery and Heart Rate Zone analysis, Exportable PDF heart reports, ECG data comparison, HRV rMSSD and heart rate calibration

**Features:** Family Sharing, Apple Watch app

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $3.99 | per month |
| Annual | $24.99 | per year |
| Data Plus | $9.99 | one-time |
| Reports Plus | $9.99 | one-time |
| Analytics Plus | $9.99 | one-time |
| Complete Premium | $24.99 | one-time |
| Lifetime Access | $49.99 | one-time |

**What reviewers like**

- 🚀 Great app for health monitoring
- 👍 Packed with useful information
- 🚀 Excellent visualizations and charts
- 👍 Easy to use and understand
- 👍 Helpful for monitoring heart conditions

**What reviewers complain about**

- 🐛 Occasional crashes or bugs
- 🔋 Drains Apple Watch battery
- 🔍 Needs more explanation of metrics
- 🔍 Visuals could be improved for easier reading
- 🔍 Automatic updates to complications not reliable

**Reported bugs**

- Premium features not working as expected
- Syncing issues between iPhone and Apple Watch
- Oxygen level tracking not functioning properly

**Requested features**

- Add blood pressure monitoring
- Allow generating reports for current month
- Improve ECG interpretation guidance
- Add option to customize Apple Watch complications


### Blood Oxygen

[App page](https://appshunter.io/ios/app/blood-oxygen/id1505627452)

Measure your blood oxygen saturation levels directly from your wrist. This app helps you assess oxygen levels, understand how well your body is absorbing oxygen, and gain insights into your overall wellness. It records measurements for later review.

**Highlights:** On-demand blood oxygen measurements, Periodic background measurements, Overnight measurements, Stores measurements in Health app, Filter measurements by sleep or elevation

**Features:** Apple Watch app

**In-app purchases:** none


## Frequently asked questions

### Is Heart Analyzer free?

Heart Analyzer is free to download, with in-app purchases available.

### Is Blood Oxygen free?

Blood Oxygen is free to download, with no in-app purchases.

### Which has better reviews, Heart Analyzer or Blood Oxygen?

Heart Analyzer is rated higher. Heart Analyzer averages 4.7 out of 5 from 22K ratings, while Blood Oxygen averages 3.9 from 127 ratings.

### Do Heart Analyzer or Blood Oxygen have ads?

Neither Heart Analyzer nor Blood Oxygen shows ads.

### Which is updated more often, Heart Analyzer or Blood Oxygen?

Heart Analyzer ships an update weekly, and Blood Oxygen every 9 months. Most recently, Heart Analyzer was updated on November 1, 2026 and Blood Oxygen on October 24, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*